Latest Update：2026/03/24 10:41:58

OKA Kazutaka

Researcher Name: OKA Kazutaka

Div (Section) name/title: Center for Climate Change Adaptation（Climate Change Impacts Monitoring Research Section）／Head

Research Subject

Fiscal Year: 2025
- 27233 : Research on evaluation and clarification of effects and mechanisms of climate change
- 27234 : Research on Advancement of Climate Change Impact Assessment Methodology
- 27245 : Climate change adaptation domain: Foresight and Advanced Basic Research
- 27283 : Study on the effects of extreme temperatures on heat-related health and the necessary adaptation measures
- 27335 : Development of a Resilient Smart Network System against Natural Disasters (Subproject B)
- 27345 : Center for Strategic Co-creation of Society through Regional Climate Data and Advanced Science
- 27363 : Intellectual research infrastructure development：Systematic monitoring, development of information on impact prediction and adaptation, and development of tools in the field of climate change adaptation
- 27471 : Data Collection and Data-Driven Analysis of Health Impacts Associated with Climate Change
Fiscal Year: 2024
- 26848 : Research on evaluation and clarification of effects and mechanisms of climate change
- 26849 : Research on Advancement of Climate Change Impact Assessment Methodology
- 26860 : Climate change adaptation domain: Foresight and Advanced Basic Research
- 26886 : Study on the effects of extreme temperatures on heat-related health and the necessary adaptation measures
- 26924 : Center for Strategic Co-creation of Society through Regional Climate Data and Advanced Science
- 27100 : Intellectual research infrastructure development：Systematic monitoring, development of information on impact prediction and adaptation, and development of tools in the field of climate change adaptation
- 27110 : Development of an Integrated Database and Analysis Tools for Supporting Adaptation Planning
- 27154 : Feasibility study to develop advanced heat index measurement technology for heatstroke risk reduction through industry-government-academia collaboration
- 27155 : Development of a Resilient Smart Network System against Natural Disasters (Subproject B)
Fiscal Year: 2023
- 26435 : Research on evaluation and clarification of effects and mechanisms of climate change
- 26436 : Research on Advancement of Climate Change Impact Assessment Methodology
- 26451 : Climate change adaptation domain: Foresight and Advanced Basic Research
- 26644 : Center for Strategic Co-creation of Society through Regional Climate Data and Advanced Science
- 26674 : Development of an Integrated Database and Analysis Tools for Supporting Adaptation Planning
- 26675 : Climate change and human health in Asia: current impacts, future risks, and health benefits of mitigation policies
- 26676 : Study on the effects of extreme temperatures on heat-related health and the necessary adaptation measures
- 26736 : Intellectual research infrastructure development：Systematic monitoring, development of information on impact prediction and adaptation, and development of tools in the field of climate change adaptation
- 26752 : Intellectual research infrastructure development: Joint research on climate change adaptation with local climate change adaptation centers
- 26785 : Development of a Resilient Smart Network System against Natural Disasters (Subproject B)
Fiscal Year: 2022
- 26001 : Research on evaluation and clarification of effects and mechanisms of climate change
- 26002 : Research on Advancement of Climate Change Impact Assessment Methodology
- 26021 : Climate change adaptation domain: Foresight and Advanced Basic Research
- 26070 : Center for Strategic Co-creation of Society through Regional Climate Data and Advanced Science
- 26156 : Development of an Integrated Database and Analysis Tools for Supporting Adaptation Planning
- 26222 : Climate change and human health in Asia: current impacts, future risks, and health benefits of mitigation policies
- 26293 : Intellectual research infrastructure development：Systematic monitoring, development of information on impact prediction and adaptation, and development of tools in the field of climate change adaptation
- 26294 : Intellectual research infrastructure development: Joint research on climate change adaptation with local climate change adaptation centers
Fiscal Year: 2021
- 25535 : Research on evaluation and clarification of effects and mechanisms of climate change
- 25536 : Research on Advancement of Climate Change Impact Assessment Methodology
- 25673 : Climate change adaptation domain: Foresight and Advanced Basic Research
- 25674 : Intellectual research infrastructure development：Systematic monitoring, development of information on impact prediction and adaptation, and development of tools in the field of climate change adaptation
- 25697 : Intellectual research infrastructure development: Joint research on climate change adaptation with local climate change adaptation centers
- 25761 : Center for Strategic Co-creation of Society through Regional Climate Data and Advanced Science
- 25835 : Climate change and human health in Asia: current impacts, future risks, and health benefits of mitigation policies
- 25880 : Development of an Integrated Database and Analysis Tools for Supporting Adaptation Planning
Fiscal Year: 2020
- 25100 : Environment-Economy-Society Integration Research Program
- 25127 : Center for Climate Change Adaptation (CCCA)
- 25184 : Studies on Adaptation Strategies Considering Social Change
- 25242 : Development of an Integrated Database and Analysis Tools for Supporting Adaptation Planning
- 25327 : Studies on Advancing the Methods for Climate Change Impacts Assessment
Fiscal Year: 2019
- 24697 : Environment-Economy-Society Integration Research Program
- 24757 : Center for Climate Change Adaptation (CCCA)
- 24975 : Studies on Advancing the Methods for Climate Change Impacts Assessment
- 24990 : Studies on Adaptation Strategies Considering Social Change
- 25064 : Development of technology for climate change impact assessment
- 25069 : Investigation of promoting multifaceted research on climate change adaptation
Fiscal Year: 2018
- 24340 : Climate Change Strategy Collaboration Office
- 24356 : Environment-Economy-Society Integration Research Program

View all

Research Result (Publication)

Original Paper

In-hospital mortality of heat-related disease associated with wet bulb globe temperature: a Japanese nationwide inpatient data analysis

Presenter : Nakamura K., Okada A., Watanabe H., Oka K., Honda Y., Matsui H., Fushimi K., Yasunaga H., Kim Y.
Title : , International Journal of Biometeorology, 1-12 (2025)
Original Paper

Comparing Integrated Heat Stress Indicators With Raw Meteorological Variables in Predicting Heat Stroke‐Related Ambulance Transportations in Japan

Presenter : Guo Q., Phung V.L.H., Ng C.F.S., Oka K., Honda Y., Hashizume M.
Title : , GeoHealth, 9(e2024GH001257):1-12 (2025)
Original Paper

Economic burden of ambulance transports for patients with heatstroke under climate change: comparison of the effects of gradual temperature increases and extreme heat events

Presenter : Oka K., He J., Honda Y., Hijioka Y.
Title : , Environmental Research Communications, 7(041009):1-13 (2025)
Original Paper

Predicting the reduction in heatstroke and heart disease-related mortality under urban modification scenarios using machine learning

Presenter : Ohashi Y., Nakajima K., Takane Y., Ihara T., Oka K.
Title : , Environmental Research: Health, 3(025001):1-16 (2025)
Book

Chapter 8 The Advancement of Climate Change Impact Assessment Methodology Project at National Institute for Environmental Studies

Presenter : Hanasaki N., Okada M., Ishizaki N., Masutomi Y., Inoue T., Wang Q-X., Koide D., Kohzu A., Kumagai N., Higashi H., Oka K., Ishihama F., Hayashi S.
Title : , Climate Change Impacts and Adaptation Strategies in Japan (2025)
Original Paper

Projected compound effects of population aging and climate warming on emergency ambulance demand in Japan

Presenter : Madaniyazi L., Oka K., Honda Y., Hashizume M.
Title : , Environment International, 202(109619):1-7 (2025)
Original Paper

Enhancing the Explainability of Representation of Surface Downward Shortwave Fluxes from Atmospheric Reanalysis Data Products

Presenter : Watanabe T., Oka K., Hijioka Y.
Title : , Artificial Intelligence for the Earth Systems, 4(3):1-22 (2025)
Book

Compound Impacts of COVID-19 Pandemic and Heat Stroke and Its Countermeasures: Examples from Japan

Presenter : Oka K.
Title : , COVID-19 Impacts on Health and Health Systems (2025)
Original Paper

Nationwide high-resolution heat risk projections and intervention cost analysis for the elderly in Japan under climate and demographic changes

Presenter : Oyama T., Takakura J., Ishizaki N., Oka K., Honda Y. , Masago Y., Hijioka Y.
Title : , Environmental Research, 286(3): (2025)
Original Paper

Future heatstroke mortality in Japan: Impacts of climate, demographic changes, and long-term heat adaptation

Presenter : Oka K., Phung V.L.H., He J., Honda Y., Hashizume M., Hijioka Y.
Title : , Environmental Research, 287(15):1-10 (2025)
Original Paper

Determining Location-Specific Thresholds for Heat Warning Systems to Mitigate Heatstroke Mortality in Japan

Presenter : Phung V.L.H., Honda Y., Oka K., Madaniyazi L., Ng C.F.S., Tobias A., Hashizume M.
Title : , Environment & Health, (5c00113):1-10 (2025)
Original Paper

Projected temperature-related mortality attributable to the urban heat island effect in the Tokyo Metropolitan Area stratified by age and geographical location

Presenter : He J., Madaniyazi L., Chua P.L.C., Kim Y., Milojevic A., Oka K., Honda Y., Hashizume M.
Title : , Environment International, 205(109921):1-12 (2025)
Book

Heat-Related Health Impacts of Climate Change and Adaptation Strategies in Japan

Presenter : Oka K.
Title : , Climate Change and Human Health Scenarios: International Case Studies (2024)
Original Paper

Prediction of ambulance transport system collapse under extremely high temperatures induced by climate change

Presenter : Oka K., Honda Y., Hijioka Y.
Title : , Environmental Research: Health, 2(035002):1-12 (2024)
Original Paper

Random forest analysis of the relative importance of meteorological indicators for heatstroke cases in Japan based on the degree of severity and place of occurrence

Presenter : Oka K., He J., Honda Y., Hijioka Y.
Title : , Environmental Research, 263(120066):1-10 (2024)
Original Paper

Non-optimal temperature-attributable mortality and morbidity burden by cause, age and sex under climate and population change scenarios: a nationwide modelling study in Japan

Presenter : Yuan L., Madaniyazi L., Vicedo-Cabrera A.M., Ng C.F.S., Oka K., Chua P.L.C., Ueda K., Tobias A., Honda Y., Hashizume M.
Title : , The Lancet Regional Health - Western Pacific, 52(101214):1-13 (2024)
Original Paper

Impact of the urban heat island on heat-related mortality in the Tokyo Metropolitan Area, Japan

Presenter : He J., Madaniyazi L., Chua P.L.C., Kim Y., Milojevic A., Oka K., Honda Y., Hashizume M.
Title : , Environmental Research: Health, 3(015003):1-10 (2024)
Original Paper

Potential effect of heat adaptation on association between number of heatstroke patients transported by ambulance and wet bulb globe temperature in Japan

Presenter : Oka K., Honda, Y., Phung V., Hijioka Y.
Title : , Environmental Research, 216(3):114666 (2023)
Original Paper

Daily temperature effects on under-five mortality in a tropical climate country and the role of local characteristics

Presenter : Phung V.L.H., Oka K., Honda Y., Hijioka Y., Ueda K., Seposo X.T., Sahani M., Wan Mahiyuddin W.R., Yoonhee Kim
Title : , Environmental Research, 218:114988 (2023)
Original Paper

Launching criteria of 'Heatstroke Alert' in Japan according to regionality and age group

Presenter : Oka K., Honda Y., Hijioka Y.
Title : , Environmental Research Communications, 5(025002):1-13 (2023)
Original Paper

Mortality Risk of Hot Nights: A Nationwide Population-Based Retrospective Study in Japan

Presenter : Kim S.E., Hashizume M., Armstrong B., Gasparrini A., Oka K., Hijioka Y., Vicedo-Cabrera A.M., Honda Y.
Title : , Environmental Health Perspectives, 131(5):057005-1-057005-12 (2023)
Original Paper

Prediction of climate change impacts on heatstroke cases in Japan's 47 prefectures with the effect of long-term heat adaptation

Presenter : Oka K., Honda Y., Phung V., Hijioka Y.
Title : , Environmental Research, 232(1):116390 (2023)
Original Paper

Quantification of the interannual variability of the nationwide electric power supply from photovoltaic systems in Japan

Presenter : Watanabe T., Oka K., Hijioka Y.
Title : , Environmental Research Communications, 5(9): (2023)
Original Paper

Machine learning analysis and risk prediction of weather-sensitive mortality related to cardiovascular disease during summer in Tokyo, Japan

Presenter : Ohashi Y., Ihara T., Oka K., Takane Y., Kikegawa Y.
Title : , Scientific reports, 13(17020):1-12 (2023)
Original Paper

Positive Association of Aggression with Ambient Temperature

Presenter : Kim E.S., Kim Y., Hashizume M., Honda Y., Oka K., Hijioka Y.
Title : , YALE JOURNAL OF BIOLOGY AND MEDICINE, 96:189-196 (2023)
Original Paper

Net impact of air conditioning on heat-related mortality in Japanese cities

Presenter : Chu P.L.C., Takan Y. , Ng C.F.S, Oka K., Honda Y., Kim Y., Hashizume M.
Title : , Environment International, 181: 108310 (2023)
Original Paper

Enhancing health resilience in Japan in a changing climate

Presenter : Kim Y., Oka K., Kawazu E.C., Ng C.F.S., Seposo X., Ueda K., Hashizume M., Honda Y.
Title : , The Lancet Regional Health - Western Pacific, 40(100970):1-17 (2023)
Original Paper

A Nationwide Comparative Analysis of Temperature-Related Mortality and Morbidity in Japan

Presenter : Yuan L., Madaniyazi L., Vicedo Cabrera A.M., Honda Y., Chu P.L.C., Ueda K., Oka K., Tobias A., Hashizume M.
Title : , Environmental Health Perspectives, 131(12):1-9 (2023)
Original Paper

Environmental variable importance for under-five mortality in Malaysia: A random forest approach

Presenter : Phung V.L.H., Oka K., Hijioka Y., Ueda K., Sahani M., Wan Mahiyuddin W.R.
Title : , Science of The Total Environment, 845:157312 (2022)
Original Paper

Quantification of Effects of Errors in the Cloud Properties on the Representation of the Surface Downward Shortwave Flux Based on MERRA-2 in Japan

Presenter : Watanabe T., Oka K., Hijioka Y.
Title : , Journal of Applied Meteorology and Climatology, 61(10):1509-1532 (2022)
Original Paper

Assessment of characteristics of surface solar irradiance on consecutive days using a self‐organizing map and clustering methods

Presenter : Watanabe T., Oka K., Hijioka Y.
Title : , Meteorological Applications, 28(2): (2021)
Other Publications

4.1 National adaptation plans for climate change and health; 4.9 Conveying the urgency of the challenges: tackling barriers to implementation

Presenter : Oka K.
Title : , The imperative of climate action to promote and protect health in Asia, 55,71-72 (2021)
Original Paper

Prediction of the number of heatstroke patients transported by ambulance in Japan's 47 prefectures: proposal of heat acclimatization consideration

Presenter : Oka K., Hijioka Y.
Title : , Environmental Research Communications, 3(12):1-14 (2021)
Original Paper

Climate change impacts on potential solar energy production: A study case in Fukushima, Japan

Presenter : Oka K., Wataru M., Ashina S.
Title : , Renewable Energy, 153:249-260 (2020)
Original Paper

Potential Diversified Transportation Energy Mix Solutions for the ASEAN Countries

Presenter : Oka K., Mizutani W., Ichikawa S.
Title : , Asian Journal of Atmospheric Environment, 13(1):45-61 (2019)

View all

In-hospital mortality of heat-related disease associated with wet bulb globe temperature: a Japanese nationwide inpatient data analysis

Presenter : Nakamura K., Okada A., Watanabe H., Oka K., Honda Y., Matsui H., Fushimi K., Yasunaga H., Kim Y.
Title : , International Journal of Biometeorology, 1-12 (2025)
Comparing Integrated Heat Stress Indicators With Raw Meteorological Variables in Predicting Heat Stroke‐Related Ambulance Transportations in Japan

Presenter : Guo Q., Phung V.L.H., Ng C.F.S., Oka K., Honda Y., Hashizume M.
Title : , GeoHealth, 9(e2024GH001257):1-12 (2025)
Economic burden of ambulance transports for patients with heatstroke under climate change: comparison of the effects of gradual temperature increases and extreme heat events

Presenter : Oka K., He J., Honda Y., Hijioka Y.
Title : , Environmental Research Communications, 7(041009):1-13 (2025)
Predicting the reduction in heatstroke and heart disease-related mortality under urban modification scenarios using machine learning

Presenter : Ohashi Y., Nakajima K., Takane Y., Ihara T., Oka K.
Title : , Environmental Research: Health, 3(025001):1-16 (2025)
Projected compound effects of population aging and climate warming on emergency ambulance demand in Japan

Presenter : Madaniyazi L., Oka K., Honda Y., Hashizume M.
Title : , Environment International, 202(109619):1-7 (2025)
Enhancing the Explainability of Representation of Surface Downward Shortwave Fluxes from Atmospheric Reanalysis Data Products

Presenter : Watanabe T., Oka K., Hijioka Y.
Title : , Artificial Intelligence for the Earth Systems, 4(3):1-22 (2025)
Nationwide high-resolution heat risk projections and intervention cost analysis for the elderly in Japan under climate and demographic changes

Presenter : Oyama T., Takakura J., Ishizaki N., Oka K., Honda Y. , Masago Y., Hijioka Y.
Title : , Environmental Research, 286(3): (2025)
Future heatstroke mortality in Japan: Impacts of climate, demographic changes, and long-term heat adaptation

Presenter : Oka K., Phung V.L.H., He J., Honda Y., Hashizume M., Hijioka Y.
Title : , Environmental Research, 287(15):1-10 (2025)
Determining Location-Specific Thresholds for Heat Warning Systems to Mitigate Heatstroke Mortality in Japan

Presenter : Phung V.L.H., Honda Y., Oka K., Madaniyazi L., Ng C.F.S., Tobias A., Hashizume M.
Title : , Environment & Health, (5c00113):1-10 (2025)
Projected temperature-related mortality attributable to the urban heat island effect in the Tokyo Metropolitan Area stratified by age and geographical location

Presenter : He J., Madaniyazi L., Chua P.L.C., Kim Y., Milojevic A., Oka K., Honda Y., Hashizume M.
Title : , Environment International, 205(109921):1-12 (2025)
Prediction of ambulance transport system collapse under extremely high temperatures induced by climate change

Presenter : Oka K., Honda Y., Hijioka Y.
Title : , Environmental Research: Health, 2(035002):1-12 (2024)
Random forest analysis of the relative importance of meteorological indicators for heatstroke cases in Japan based on the degree of severity and place of occurrence

Presenter : Oka K., He J., Honda Y., Hijioka Y.
Title : , Environmental Research, 263(120066):1-10 (2024)
Non-optimal temperature-attributable mortality and morbidity burden by cause, age and sex under climate and population change scenarios: a nationwide modelling study in Japan

Presenter : Yuan L., Madaniyazi L., Vicedo-Cabrera A.M., Ng C.F.S., Oka K., Chua P.L.C., Ueda K., Tobias A., Honda Y., Hashizume M.
Title : , The Lancet Regional Health - Western Pacific, 52(101214):1-13 (2024)
Impact of the urban heat island on heat-related mortality in the Tokyo Metropolitan Area, Japan

Presenter : He J., Madaniyazi L., Chua P.L.C., Kim Y., Milojevic A., Oka K., Honda Y., Hashizume M.
Title : , Environmental Research: Health, 3(015003):1-10 (2024)
Potential effect of heat adaptation on association between number of heatstroke patients transported by ambulance and wet bulb globe temperature in Japan

Presenter : Oka K., Honda, Y., Phung V., Hijioka Y.
Title : , Environmental Research, 216(3):114666 (2023)
Daily temperature effects on under-five mortality in a tropical climate country and the role of local characteristics

Presenter : Phung V.L.H., Oka K., Honda Y., Hijioka Y., Ueda K., Seposo X.T., Sahani M., Wan Mahiyuddin W.R., Yoonhee Kim
Title : , Environmental Research, 218:114988 (2023)
Launching criteria of 'Heatstroke Alert' in Japan according to regionality and age group

Presenter : Oka K., Honda Y., Hijioka Y.
Title : , Environmental Research Communications, 5(025002):1-13 (2023)
Mortality Risk of Hot Nights: A Nationwide Population-Based Retrospective Study in Japan

Presenter : Kim S.E., Hashizume M., Armstrong B., Gasparrini A., Oka K., Hijioka Y., Vicedo-Cabrera A.M., Honda Y.
Title : , Environmental Health Perspectives, 131(5):057005-1-057005-12 (2023)
Prediction of climate change impacts on heatstroke cases in Japan's 47 prefectures with the effect of long-term heat adaptation

Presenter : Oka K., Honda Y., Phung V., Hijioka Y.
Title : , Environmental Research, 232(1):116390 (2023)
Quantification of the interannual variability of the nationwide electric power supply from photovoltaic systems in Japan

Presenter : Watanabe T., Oka K., Hijioka Y.
Title : , Environmental Research Communications, 5(9): (2023)
Machine learning analysis and risk prediction of weather-sensitive mortality related to cardiovascular disease during summer in Tokyo, Japan

Presenter : Ohashi Y., Ihara T., Oka K., Takane Y., Kikegawa Y.
Title : , Scientific reports, 13(17020):1-12 (2023)
Positive Association of Aggression with Ambient Temperature

Presenter : Kim E.S., Kim Y., Hashizume M., Honda Y., Oka K., Hijioka Y.
Title : , YALE JOURNAL OF BIOLOGY AND MEDICINE, 96:189-196 (2023)
Net impact of air conditioning on heat-related mortality in Japanese cities

Presenter : Chu P.L.C., Takan Y. , Ng C.F.S, Oka K., Honda Y., Kim Y., Hashizume M.
Title : , Environment International, 181: 108310 (2023)
Enhancing health resilience in Japan in a changing climate

Presenter : Kim Y., Oka K., Kawazu E.C., Ng C.F.S., Seposo X., Ueda K., Hashizume M., Honda Y.
Title : , The Lancet Regional Health - Western Pacific, 40(100970):1-17 (2023)
A Nationwide Comparative Analysis of Temperature-Related Mortality and Morbidity in Japan

Presenter : Yuan L., Madaniyazi L., Vicedo Cabrera A.M., Honda Y., Chu P.L.C., Ueda K., Oka K., Tobias A., Hashizume M.
Title : , Environmental Health Perspectives, 131(12):1-9 (2023)
Environmental variable importance for under-five mortality in Malaysia: A random forest approach

Presenter : Phung V.L.H., Oka K., Hijioka Y., Ueda K., Sahani M., Wan Mahiyuddin W.R.
Title : , Science of The Total Environment, 845:157312 (2022)
Quantification of Effects of Errors in the Cloud Properties on the Representation of the Surface Downward Shortwave Flux Based on MERRA-2 in Japan

Presenter : Watanabe T., Oka K., Hijioka Y.
Title : , Journal of Applied Meteorology and Climatology, 61(10):1509-1532 (2022)
Assessment of characteristics of surface solar irradiance on consecutive days using a self‐organizing map and clustering methods

Presenter : Watanabe T., Oka K., Hijioka Y.
Title : , Meteorological Applications, 28(2): (2021)
Prediction of the number of heatstroke patients transported by ambulance in Japan's 47 prefectures: proposal of heat acclimatization consideration

Presenter : Oka K., Hijioka Y.
Title : , Environmental Research Communications, 3(12):1-14 (2021)
Climate change impacts on potential solar energy production: A study case in Fukushima, Japan

Presenter : Oka K., Wataru M., Ashina S.
Title : , Renewable Energy, 153:249-260 (2020)
Potential Diversified Transportation Energy Mix Solutions for the ASEAN Countries

Presenter : Oka K., Mizutani W., Ichikawa S.
Title : , Asian Journal of Atmospheric Environment, 13(1):45-61 (2019)

View all

Chapter 8 The Advancement of Climate Change Impact Assessment Methodology Project at National Institute for Environmental Studies

Presenter : Hanasaki N., Okada M., Ishizaki N., Masutomi Y., Inoue T., Wang Q-X., Koide D., Kohzu A., Kumagai N., Higashi H., Oka K., Ishihama F., Hayashi S.
Title : , Climate Change Impacts and Adaptation Strategies in Japan (2025)
Compound Impacts of COVID-19 Pandemic and Heat Stroke and Its Countermeasures: Examples from Japan

Presenter : Oka K.
Title : , COVID-19 Impacts on Health and Health Systems (2025)
Heat-Related Health Impacts of Climate Change and Adaptation Strategies in Japan

Presenter : Oka K.
Title : , Climate Change and Human Health Scenarios: International Case Studies (2024)

View all

4.1 National adaptation plans for climate change and health; 4.9 Conveying the urgency of the challenges: tackling barriers to implementation

Presenter : Oka K.
Title : , The imperative of climate action to promote and protect health in Asia, 55,71-72 (2021)

View all

Research Result (Presentation)

Research Lecture

Current and Future Status of Heatstroke in Japan and Its Adaptations in Changing Climate and Aging Society

Presenter : Oka K.
Name of Society : APEC Population Aging and Environmental Health Policy Dialogue (2026)
Name of Proceedings : -
Research Lecture

Risks of heatstroke and early warning of heatwaves in Japan

Presenter : Oka K.
Name of Society : 2025 Balaton Group Meeting (2025)
Name of Proceedings : -
Research Presentation

Associations of Perceptual temperature sensitivity and Physiological Responses to Temperature Changes with Meteoropathy

Presenter : Matsuo S., Miura R., Tomita Y., Loh P.Y., Fukuda J., Wakabayashi H., Oka K., Takakura J., Arima K., Nishimura T.
Name of Society : 17th International Congress of Physiological Anthropology (2025)
Name of Proceedings : Abstracts, 29
Research Lecture

Heatstroke under Climate Change and Adaptation Strategies in Japan

Presenter : Oka K.
Name of Society : 2025 Heat Early Warning System Symposium - Predicting, Monitoring & Communicating Risks of Heatwaves (2025)
Name of Proceedings : -
Research Lecture

A project on the Impacts of Extreme Heat on Human Health and Strategies for Adaptation

Presenter : Oka K.
Name of Society : Bridging Nations, Protecting Generations: Prevention Strategies against Climate-sensitive Diseases in Elderly Populations of Japan and Germany: Workshop Planning of joint research projects (2025)
Name of Proceedings : -
Research Presentation

Projected Urban Heat Island–Attributable Mortality in Tokyo Metropolitan Area, Japan, Across Age Groups and Geographies Under Future Climate and Demographic Scenarios

Presenter : He J., Madaniyazi L., Chua P.L.C., Kim Y., Oka K., Honda Y., Hashizume M.
Name of Society : Joint Annual Meeting of the International Society of Exposure Science and the International Society for Environmental Epidemiology 2025 (2025)
Name of Proceedings : Abstracts
Research Presentation

Analysis of important meteorological indicators of heatstroke mortality in Japan

Presenter : Oka K., He J., Phung V.L.H., Honda Y., Hashizume M., Hijioka Y.
Name of Society : 12th International Conference on Urban Climate (2025)
Name of Proceedings : -
Research Lecture

Heatstroke under changing climate and adaptation measures in Japan

Presenter : Oka K.
Name of Society : Expo 2025 Osaka - Health and Well-being Week, HEALTH AND CLIMATE CHANGE: THE GREATEST CHALLENGE OF OUR TIME (2025)
Name of Proceedings : -
Research Presentation

Assessing the impact of natural disasters on renewable energy potential

Presenter : Oka K.
Name of Society : 日本地球惑星科学連合2025年大会 (2025)
Name of Proceedings : 日本地球惑星科学連合2025年大会予稿集
Research Lecture

Heatstroke under changing climate and adaptation measures in Japan

Presenter : Oka K.
Name of Society : Western Pacific Climate and Health Responder Course (2025)
Name of Proceedings : -
Research Lecture

Climate change impacts on health and adaptation measures

Presenter : Oka K.
Name of Society : Nagasaki University International Symposium: Risk and the International Community (2025)
Name of Proceedings : -
Heat-Related Health Impacts Caused by Climate Change and the Urban Heat Island Effect

Presenter : Oka K.
Name of Society : 2nd International Conference on Climate Adaptation and Resilience (2025)
Name of Proceedings : -
Research Presentation

A targeted approach for heat illness prevention: mapping high-risk population at 1 km grid resolution and policy implications for adaptation in Japan

Presenter : Oyama T., Takakura J., Ishizaki N., Oka K., Honda Y., Masago Y., Hijioka Y.
Name of Society : The 8th International Adaptation Futures Conference (2025)
Name of Proceedings : -
Research Presentation

Impact of spatial resolution on temperature–mortality associations: evidence from municipality- and prefecture-level analyses in Japan

Presenter : He J., Honda Y., Lina M., Chua P.L.C., Hashizume M., Oka K.
Name of Society : The 90th Annual Meeting of the JSHHE of the Japanese Society of Health and Human Ecology (2025)
Name of Proceedings : Impact of spatial resolution on temperature–mortality associations: evidence from municipality- and prefecture-level analyses in Japan
Research Presentation

Machine learning approach to predict mortality reduction from summer heatstroke and heart disease through urban modification scenarios for climate change adaptation

Presenter : Ohashi Y., Nakajima K., Takane Y., Kikegawa Y., Ihara T., Oka K.
Name of Society : European Meteorological Society (EMS) Annual Meeting (2024)
Name of Proceedings : -
Research Presentation

Projection of impacts on ambulance transport system and economic burden under extremely high temperatures induced by climate change

Presenter : Oka K., Honda Y.
Name of Society : The 30th AIM International Workshop (2024)
Name of Proceedings : -
Research Presentation

Enhancement Of Explainability Of Representation Of Surface Downward Shortwave Fluxes From Atmospheric Reanalysis Data Products

Presenter : Watanabe T., Oka K., Hijioka Y.
Name of Society : 9th Global Energy and Water Exchanges Open Science Conference 2024 SAPPORO (2024)
Name of Proceedings : -
Research Presentation

A Surveillance Study on Actual Situation and Factors of Air Conditioner Non-Use in the Elderly in Japan for Heat Stroke Prevention

Presenter : Fukuda J., Takakura J., Oka K., Nishimura T., Wakabayashi H.
Name of Society : The 20th International Conference on Environmental Ergonomics ICEE2024 (2024)
Name of Proceedings : Abstracts, 317-318
Research Presentation

Evaluation of the relative importance of climate indicators for heatstroke cases in Japan

Presenter : Oka K., He J., Honda Y., Hijioka Y.
Name of Society : The International Society for Environmental Epidemiology Asia and Western Pacific Chapter & International Society of Exposure Science Asia Chapter Joint Conference 2024 (2024)
Name of Proceedings : Abstract Book, 134-135
Research Presentation

Interactive effects of Ozone and temperature on mortality in Japan

Presenter : Kim S.E., Honda Y., Ng C.F.S., Oka K., Nagashima T., Hashizume M.
Name of Society : The International Society for Environmental Epidemiology Asia and Western Pacific Chapter & International Society of Exposure Science Asia Chapter Joint Conference 2024 (2024)
Name of Proceedings : Abstract Book, 202-202
Research Presentation

Non-optimal temperature-attributable mortality and morbidity burden by cause, age, sex under climate and population change scenarios: A nationwide modelling study in Japan

Presenter : Yuan L., Madaniyazi L., Vicedo-Cabrera A.M., Ng C.F.S., Oka K., Ueda K., Tobias A., Honda Y., Hashizume M.
Name of Society : The International Society for Environmental Epidemiology Asia and Western Pacific Chapter & International Society of Exposure Science Asia Chapter Joint Conference 2024 (2024)
Name of Proceedings : Abstract Book, 287-288
Research Presentation

Climate change and health policy (Alert system) and related studies

Presenter : Oka K.
Name of Society : Joint workshop on the impacts of climate change and extreme events on human health in Asia and beyond (2024)
Name of Proceedings : -
Research Presentation

URBAN HEAT ISLANDS AND TEMPERATURE RELATED MORTALITY IN A WARMING CLIMATE

Presenter : He J., Oka K., Honda Y., Hashizume M.
Name of Society : 第89回日本健康学会総会 (2024)
Name of Proceedings : 第89回日本健康学会総会講演集, 25-26
Research Presentation

Association between heatstroke incidence and wet bulb globe temperature in Japan according to regionality and location of occurrence

Presenter : Oka K., Honda Y., Phung V.L.H., Hijioka Y.
Name of Society : 35th Annual Conference of the International Society for Environmental Epidemiology (2023)
Name of Proceedings : Abstract E-Book, 705
Research Presentation

“Cumulative preventable number” for heat-health alert system

Presenter : Honda Y., Oka K., Hijioka Y.
Name of Society : 35th Annual Conference of the International Society for Environmental Epidemiology (2023)
Name of Proceedings : Abstract E-Book, 673
Research Presentation

Seasonal Variations in Mortality Risk Associated with Ozone Concentrations in Tokyo, Japan

Presenter : Kim E.S., Honda Y., Hashizume M., Ng C.F.S, Oka K., Nagashima T.
Name of Society : 35th Annual Conference of the International Society for Environmental Epidemiology (2023)
Name of Proceedings : Abstract E-Book, 342
Research Presentation

A nationwide comparative analysis of temperature effect on mortality and morbidity in Japan

Presenter : Yuan L., Madaniyazi L., Vicedo Cabrera A.M., Honda Y., Ng C.F.S, Ueda K., Oka K., Tobias A., Hashizume M.
Name of Society : 35th Annual Conference of the International Society for Environmental Epidemiology (2023)
Name of Proceedings : Abstract E-Book, 627
Research Presentation

Analysis of important meteorological factors in the number of patients with heatstroke by age and severity in Japan

Presenter : Oka K., Phung V., Honda Y., Hijioka Y.
Name of Society : 11th International Conference on Urban Climate (2023)
Name of Proceedings : -
Research Presentation

Machine learning analyses of climate-sensitive cardiovascular diseases in an urban region

Presenter : Ohashi Y., Ihara T., Oka K., Takane Y., Kikegawa Y.
Name of Society : 11th International Conference on Urban Climate (2023)
Name of Proceedings : -
Research Lecture

Climate Change and Health

Presenter : Oka K.
Name of Society : Topics in Environmental Health (2023)
Name of Proceedings : -
Research Lecture

Prediction of climate change impacts on heatstroke risks

Presenter : Oka K.
Name of Society : IBM Environmental Sciences Seminar Series (2023)
Name of Proceedings : -
Research Presentation

Short-term Effects of Ozone on the Mortality and Effect Modification by Temperature in Japan

Presenter : Kim E.S., Honda Y., Ng C.F.S., Oka K., Nagashima T., Hashizume M.
Name of Society : AGU Fall Meeting 2023 (2023)
Name of Proceedings : なし
Research Lecture

Role and key activities of the Center for Climate Change Adaptation in Japan

Presenter : Machimura T., Masago Y., Oka K., Fujita T., Yoshida Y., Oyama T., Hijioka Y.
Name of Society : The 2023 International Joint Workshop for Sharing Climate Change Impact and Adaptation Knowledge between Korea and Japan (2023)
Research Presentation

Prediction of climate change impacts on heatstroke cases in Japan considering long-term heat adaptation

Presenter : Oka K., Honda Y., Phung V.L.H., Hijioka Y.
Name of Society : The 2023 International Joint Workshop for Sharing Climate Change Impact and Adaptation Knowledge between Korea and Japan (2023)
Name of Proceedings : -
Research Presentation

Prediction of climate change impacts on heatstroke cases in Japan's 47 prefectures considering long-term heat adaptation

Presenter : Oka K., Honda Y., Phung V.L.H., Hijioka Y.
Name of Society : 気候変動シンポジウム「気候変動対策と未来ビジョンー適応・緩和研究の展望」 (2023)
Name of Proceedings : -
Research Presentation

Investigating the Regional Concentrations-Response Relations between PM2.5 and Daily Mortality in Japan

Presenter : Kim S. E., Honda Y., Ng C. F. S., Oka K., Nagashima T., Hijioka Y.
Name of Society : 34th Annual Conference of the International Society for Environmental Epidemiology (2022)
Name of Proceedings : Abstract Book, 880
Research Presentation

Method to set the wet bulb globe temperature criterion beyond which the heatstroke alert is issued

Presenter : Honda Y., Oka K., Hijioka Y.
Name of Society : 34th Annual Conference of the International Society for Environmental Epidemiology (2022)
Name of Proceedings : Abstract Book, 1124
Research Presentation

Comparison of heat related mortality estimated using ambient temperature and wet bulb globe temperature in Japan: Supporting evidence for the heat health warning system

Presenter : Watanabe H., Honda Y., Oka K., Hashizume M., Tobias A., Kim Y.
Name of Society : 34th Annual Conference of the International Society for Environmental Epidemiology (2022)
Name of Proceedings : Abstract Book, 1411
Research Presentation

Heat-related deaths and ambulance transports after typhoon triggered power outages: a quasi-experimental study in the metropolitan areas of Japan

Presenter : Yamasaki L., Kamada T., Ng C. F. S., Kim Y., Takane Y., Nakajima K., Honda Y., Yamaguchi K., Oka K., Hashizume M.
Name of Society : 34th Annual Conference of the International Society for Environmental Epidemiology (2022)
Name of Proceedings : Abstract Book, 391
Research Presentation

Prediction of the impact of climate change on the heatstroke incidence in Japan with the long-term effect of heat-adaptation

Presenter : Oka K., Honda Y., Phung V., Hijioka Y.
Name of Society : The 28th AIM International Workshop (2022) (2022)
Name of Proceedings : -
Research Presentation

Prediction of the impact of climate change on the number of heatstroke patients in Tokyo, Japan with heat-adaptation effects

Presenter : Oka K., Honda Y., Phung V., Hijioka Y.
Name of Society : 34th Annual Conference of the International Society for Environmental Epidemiology (2022)
Name of Proceedings : Abstract Book, 1416
Research Presentation

Ambient Particulate Air Pollution and Premature Mortality in two Asian Megacities

Presenter : Kim S. E., Honda Y., Hashizume M., Ng C. F. S., Oka K., Hijioka Y., Nagashima T., Kim H.
Name of Society : The 19th International Conference of the Pacific Basin Consortium for Environment and Health (2022)
Name of Proceedings : Conference Proceedings Booklet, 73
Research Presentation

Evaluation of Extreme Heat Events under Climate Change and its Resulting Impact on Heatstroke Cases in Japan using Generalized Extreme Value Distribution

Presenter : Oka K., Phung V., Honda, Y., Hijioka Y.
Name of Society : AGU Fall Meeting 2022 (2022)
Name of Proceedings : -
Research Presentation

Spatial heterogeneity and the area-specific predictors in the association between particle matter air pollution and mortality in Japan

Presenter : Kim S.E., Honda Y., Hashizume M., Ng C.F.S., Nagashima T., Oka K., Hijioka Y.
Name of Society : AGU Fall Meeting 2022 (2022)
Name of Proceedings : -
Research Presentation

Health impact assessments of vegetation fires - A systematic review

Presenter : Phung V.L.H., Park C., Phosri A., Oka K., Honda Y.
Name of Society : AGU Fall Meeting 2022 (2022)
Name of Proceedings : -
Research Presentation

Prediction of the impact of climate change on ambulance availability for heatstroke patients in Tokyo under extreme heat events

Presenter : Oka K., Phung V., Honda, Y., Hijioka Y.
Name of Society : Climate Change and Human Health in Asia: Current Impacts, Future Risks, and Cobenefits (2022)
Name of Proceedings : -
Research Presentation

Examining temperature effect on under-5 mortality and associated effect modifiers in Malaysia

Presenter : Phung V.L.H., Oka K., Ueda K., Seposo X.T., Sahani M., Wan Mahiyuddin W.R.
Name of Society : The 32nd Annual Scientific Meeting of the Japan Epidemiological Association (2022)
Name of Proceedings : -
Research Presentation

Association between PM10, smoke haze, and under-5 mortality in Klang Valley, Malaysia

Presenter : Phung V., Ueda K., Seposo X.T., Sahani M., Wan Mahiyuddin W.R., Oka K.
Name of Society : The 27th AIM International Workshop (2021)
Name of Proceedings : -
Research Presentation

Ambient temperature and ambulance car visits in Japan by age category and severity

Presenter : Honda Y., Oka K., Hijioka Y.
Name of Society : 33rd Annual Conference of the International Society for Environmental Epidemiology (2021)
Name of Proceedings : Abstract' E-book, 421-421
Introduction to A-PLAT & AP-PLAT

Presenter : Oka K.
Name of Society : KE4CAP EU-Japan BKE Event: Enhancing Connections Across International, National and Local Adaptation Actions (2021)
Name of Proceedings : -
Research Presentation

Localized projections of health damages from climate-driven air pollution under multiple climate and population scenarios in Japan

Presenter : Kim S. E., Honda Y., Hijioka Y., Oka K., Hashizume M., Ng C. F. S., Kawano N., Matsuhashi K., Nagashima T.
Name of Society : Planetary Health WS: Climate Change Impact on Environment and Human Health (2021)
Name of Proceedings : -
Research Presentation

A study on the regional characteristics of heatstroke incidence in Japan

Presenter : Oka K., Honda Y.
Name of Society : PLANETARY HEALTH WORKSHOP 2021: CLIMATE CHANGE IMPACT ON ENVIRONMENT AND HUMAN HEALTH (2021)
Name of Proceedings : -
Research Lecture

Prediction of heatstroke patients in Japan: proposal of heat adaptation consideration

Presenter : Oka K.
Name of Society : MoU Signing Ceremony and Kick-off Symposium on Planetary Health (2021)
Name of Proceedings : -
Research Presentation

Association between PM10, Smoke Haze, and Under-5 Mortality in Klang Valley, Malaysia (2014-2016)

Presenter : Phung V.L.H., Ueda K., Seposo X.T., Sahani M., Wan Mahiyuddin W.R., Oka K.
Name of Society : AGU Fall Meeting 2021 (2021)
Name of Proceedings : -
Research Presentation

Environmental variable importance for under-5 mortality in Malaysia: A random forest approach

Presenter : Phung V.L.H., Oka K., Hijioka Y., Ueda K., Wan Mahiyuddin W.R., Sahani M.
Name of Society : The 86th Annual Meeting of the Japanese Society of Health and Human Ecology (2021)
Name of Proceedings : -
Research Presentation

Promoting climate change adaptation through online platform: the case of Japan (A-PLAT)

Presenter : Masago Y., Fujita T., Oka K., Hijioka Y.
Name of Society : 6th International Climate Change Adaptation Conference (Adaptation Futures 2020) (2021)
Name of Proceedings : Abstracts, 186-187
Research Presentation

Development of the Asia-Pacific Climate Change Adaptation Information Platform (AP-PLAT) and its Future Prospects

Presenter : Oka K., Masago Y., Fujita T., Hijioka Y.
Name of Society : 6th International Climate Change Adaptation Conference (Adaptation Futures 2020) (2021)
Name of Proceedings : Abstracts, 188-189
Research Presentation

Study on climate change impact on human health

Presenter : Oka K.
Name of Society : The 27th AIM International Workshop (2021) (2021)
Name of Proceedings : -
Climate Impact Viewer

Presenter : Oka K.
Name of Society : The 27th AIM training Workshop (2021) (2021)
Name of Proceedings : -
Research Presentation

Difference in heatstroke ambulance visit risk by month in Japan

Presenter : Honda Y., Oka K., Hijioka Y.
Name of Society : 32nd Annual Conference of the International Society for Environmental Epidemiology (2020)
Name of Proceedings : -
Research Presentation

Regional concentration-response relationships between ambient PM2.5 and cause-specific mortality in Japan

Presenter : Kim S.E., Honda Y., Hijioka Y., Oka T., Hashizume M., Ng C.F.S., Nagashima T.
Name of Society : AGU 2020 Fall Meeting (2020)
Name of Proceedings : -
Introduction of AP‐PLAT for adaptation

Presenter : Oka K.
Name of Society : A new information platform towards climate resilient societies -Asia-Pacific Climate Change Adaptation Information Platform (AP-PLAT)- (2019)
Name of Proceedings : -
Research Lecture

Sharing views on A-PLAT and AP‐Plat for adaptation

Presenter : Oka K.
Name of Society : High‐level Workshop on Climate Policy and Assessment (2019)
Name of Proceedings : -
Research Presentation

Developing a national platform in Asia and the role of AP-PLAT, as a Hub to connect experience and expertise

Presenter : Oka K., Fukumura Y., Hijioka Y.
Name of Society : 4th European Climate Change Adaptation conference (2019)
Name of Proceedings : -
Research Presentation

National Adaptation Policy and Its Influence on Local Practice: Climate Change Adaptation Act

Presenter : Fukumura Y., Oka K., Hijioka Y.
Name of Society : European Climate Change Adaptation conference (2019)
Name of Proceedings : -
Research Lecture

Introduction of climate change adaptation activities at NIES

Presenter : Oka K.
Name of Society : Myles Allen教授との研究会 (2019)
Name of Proceedings : -
Introduction of climate change adaptation information platform and related activities

Presenter : Oka K.
Name of Society : Tsukuba Conference, Climate Change Adaptation -Promoting Regional Activity – (2019)
Name of Proceedings : -
Research Lecture

Activities for Climate Change Adaptation in Japan

Presenter : Oka K.
Name of Society : AHA CENTRE EXECUTIVE PROGRAMME -JAPAN STUDY VISIT 2019 (2019)
Name of Proceedings : -
Research Lecture

Introduction of research related to energy issues

Presenter : Oka K.
Name of Society : Academic Exchange with North China Electric Power University (2019)
Name of Proceedings : -
Research Presentation

Process for creating A-PLAT: A website to facilitate implementation of the National Adaptation Plan in Japan

Presenter : Oka K., Hijioka Y., Fukumura Y., Watanabe M.
Name of Society : Adaptation Futures 2018 (2018)
Name of Proceedings : -
Research Presentation

A study on guidelines for local adaptation planning to develop a standard for local governments and communities- And developing ISO/TS 14092-

Presenter : Hijioka Y., Watanabe M., Fukumura Y., Oka K.
Name of Society : Adaptation Futures 2018 (2018)
Name of Proceedings : -
Research Presentation

Climate Change Adaptation Act and related activities in Japan

Presenter : Oka K.
Name of Society : The 24th AIM International Workshop (2018)
Name of Proceedings : -
Research Presentation

Research Collaboration for Low Carbon Development in Three Countries

Presenter : Oka K., Masui T., Hijioka Y., Lim J.H., Lim C.S., Gao Q.
Name of Society : 第15回日韓中三カ国環境研究機関長会合（TPM15） (2018)
Name of Proceedings : Abstracts
Research Presentation

Potential Study of Diversified Transportation Energy Mix in ASEAN countries

Presenter : Oka K., Mizutani W., Ichikawa S.
Name of Society : 10th Better Air Quality Conference (2018)
Name of Proceedings : 10th Better Air Quality Conference E-ABSTRACT
Introduction of Asia-Pacific Climate Change Adaptation Information Platform (AP-PLAT)

Presenter : Oka K.
Name of Society : 6th ASIA PACIFIC CLIMATE CHANGE ADAPTATIOMN FORUM (2018)
Name of Proceedings : -

View all

Analysis of important meteorological indicators of heatstroke mortality in Japan

Presenter : Oka K., He J., Phung V.L.H., Honda Y., Hashizume M., Hijioka Y.
Name of Society : 12th International Conference on Urban Climate (2025)
Name of Proceedings : -
Assessing the impact of natural disasters on renewable energy potential

Presenter : Oka K.
Name of Society : 日本地球惑星科学連合2025年大会 (2025)
Name of Proceedings : 日本地球惑星科学連合2025年大会予稿集
A targeted approach for heat illness prevention: mapping high-risk population at 1 km grid resolution and policy implications for adaptation in Japan

Presenter : Oyama T., Takakura J., Ishizaki N., Oka K., Honda Y., Masago Y., Hijioka Y.
Name of Society : The 8th International Adaptation Futures Conference (2025)
Name of Proceedings : -
Impact of spatial resolution on temperature–mortality associations: evidence from municipality- and prefecture-level analyses in Japan

Presenter : He J., Honda Y., Lina M., Chua P.L.C., Hashizume M., Oka K.
Name of Society : The 90th Annual Meeting of the JSHHE of the Japanese Society of Health and Human Ecology (2025)
Name of Proceedings : Impact of spatial resolution on temperature–mortality associations: evidence from municipality- and prefecture-level analyses in Japan
Projection of impacts on ambulance transport system and economic burden under extremely high temperatures induced by climate change

Presenter : Oka K., Honda Y.
Name of Society : The 30th AIM International Workshop (2024)
Name of Proceedings : -
Enhancement Of Explainability Of Representation Of Surface Downward Shortwave Fluxes From Atmospheric Reanalysis Data Products

Presenter : Watanabe T., Oka K., Hijioka Y.
Name of Society : 9th Global Energy and Water Exchanges Open Science Conference 2024 SAPPORO (2024)
Name of Proceedings : -
Evaluation of the relative importance of climate indicators for heatstroke cases in Japan

Presenter : Oka K., He J., Honda Y., Hijioka Y.
Name of Society : The International Society for Environmental Epidemiology Asia and Western Pacific Chapter & International Society of Exposure Science Asia Chapter Joint Conference 2024 (2024)
Name of Proceedings : Abstract Book, 134-135
Non-optimal temperature-attributable mortality and morbidity burden by cause, age, sex under climate and population change scenarios: A nationwide modelling study in Japan

Presenter : Yuan L., Madaniyazi L., Vicedo-Cabrera A.M., Ng C.F.S., Oka K., Ueda K., Tobias A., Honda Y., Hashizume M.
Name of Society : The International Society for Environmental Epidemiology Asia and Western Pacific Chapter & International Society of Exposure Science Asia Chapter Joint Conference 2024 (2024)
Name of Proceedings : Abstract Book, 287-288
Climate change and health policy (Alert system) and related studies

Presenter : Oka K.
Name of Society : Joint workshop on the impacts of climate change and extreme events on human health in Asia and beyond (2024)
Name of Proceedings : -
URBAN HEAT ISLANDS AND TEMPERATURE RELATED MORTALITY IN A WARMING CLIMATE

Presenter : He J., Oka K., Honda Y., Hashizume M.
Name of Society : 第89回日本健康学会総会 (2024)
Name of Proceedings : 第89回日本健康学会総会講演集, 25-26
Association between heatstroke incidence and wet bulb globe temperature in Japan according to regionality and location of occurrence

Presenter : Oka K., Honda Y., Phung V.L.H., Hijioka Y.
Name of Society : 35th Annual Conference of the International Society for Environmental Epidemiology (2023)
Name of Proceedings : Abstract E-Book, 705
Analysis of important meteorological factors in the number of patients with heatstroke by age and severity in Japan

Presenter : Oka K., Phung V., Honda Y., Hijioka Y.
Name of Society : 11th International Conference on Urban Climate (2023)
Name of Proceedings : -
Machine learning analyses of climate-sensitive cardiovascular diseases in an urban region

Presenter : Ohashi Y., Ihara T., Oka K., Takane Y., Kikegawa Y.
Name of Society : 11th International Conference on Urban Climate (2023)
Name of Proceedings : -
Prediction of climate change impacts on heatstroke cases in Japan considering long-term heat adaptation

Presenter : Oka K., Honda Y., Phung V.L.H., Hijioka Y.
Name of Society : The 2023 International Joint Workshop for Sharing Climate Change Impact and Adaptation Knowledge between Korea and Japan (2023)
Name of Proceedings : -
Heat-related deaths and ambulance transports after typhoon triggered power outages: a quasi-experimental study in the metropolitan areas of Japan

Presenter : Yamasaki L., Kamada T., Ng C. F. S., Kim Y., Takane Y., Nakajima K., Honda Y., Yamaguchi K., Oka K., Hashizume M.
Name of Society : 34th Annual Conference of the International Society for Environmental Epidemiology (2022)
Name of Proceedings : Abstract Book, 391
Prediction of the impact of climate change on ambulance availability for heatstroke patients in Tokyo under extreme heat events

Presenter : Oka K., Phung V., Honda, Y., Hijioka Y.
Name of Society : Climate Change and Human Health in Asia: Current Impacts, Future Risks, and Cobenefits (2022)
Name of Proceedings : -
Examining temperature effect on under-5 mortality and associated effect modifiers in Malaysia

Presenter : Phung V.L.H., Oka K., Ueda K., Seposo X.T., Sahani M., Wan Mahiyuddin W.R.
Name of Society : The 32nd Annual Scientific Meeting of the Japan Epidemiological Association (2022)
Name of Proceedings : -
Localized projections of health damages from climate-driven air pollution under multiple climate and population scenarios in Japan

Presenter : Kim S. E., Honda Y., Hijioka Y., Oka K., Hashizume M., Ng C. F. S., Kawano N., Matsuhashi K., Nagashima T.
Name of Society : Planetary Health WS: Climate Change Impact on Environment and Human Health (2021)
Name of Proceedings : -
A study on the regional characteristics of heatstroke incidence in Japan

Presenter : Oka K., Honda Y.
Name of Society : PLANETARY HEALTH WORKSHOP 2021: CLIMATE CHANGE IMPACT ON ENVIRONMENT AND HUMAN HEALTH (2021)
Name of Proceedings : -
Association between PM10, Smoke Haze, and Under-5 Mortality in Klang Valley, Malaysia (2014-2016)

Presenter : Phung V.L.H., Ueda K., Seposo X.T., Sahani M., Wan Mahiyuddin W.R., Oka K.
Name of Society : AGU Fall Meeting 2021 (2021)
Name of Proceedings : -
Environmental variable importance for under-5 mortality in Malaysia: A random forest approach

Presenter : Phung V.L.H., Oka K., Hijioka Y., Ueda K., Wan Mahiyuddin W.R., Sahani M.
Name of Society : The 86th Annual Meeting of the Japanese Society of Health and Human Ecology (2021)
Name of Proceedings : -
Promoting climate change adaptation through online platform: the case of Japan (A-PLAT)

Presenter : Masago Y., Fujita T., Oka K., Hijioka Y.
Name of Society : 6th International Climate Change Adaptation Conference (Adaptation Futures 2020) (2021)
Name of Proceedings : Abstracts, 186-187
Development of the Asia-Pacific Climate Change Adaptation Information Platform (AP-PLAT) and its Future Prospects

Presenter : Oka K., Masago Y., Fujita T., Hijioka Y.
Name of Society : 6th International Climate Change Adaptation Conference (Adaptation Futures 2020) (2021)
Name of Proceedings : Abstracts, 188-189
Study on climate change impact on human health

Presenter : Oka K.
Name of Society : The 27th AIM International Workshop (2021) (2021)
Name of Proceedings : -
Process for creating A-PLAT: A website to facilitate implementation of the National Adaptation Plan in Japan

Presenter : Oka K., Hijioka Y., Fukumura Y., Watanabe M.
Name of Society : Adaptation Futures 2018 (2018)
Name of Proceedings : -
A study on guidelines for local adaptation planning to develop a standard for local governments and communities- And developing ISO/TS 14092-

Presenter : Hijioka Y., Watanabe M., Fukumura Y., Oka K.
Name of Society : Adaptation Futures 2018 (2018)
Name of Proceedings : -
Climate Change Adaptation Act and related activities in Japan

Presenter : Oka K.
Name of Society : The 24th AIM International Workshop (2018)
Name of Proceedings : -
Research Collaboration for Low Carbon Development in Three Countries

Presenter : Oka K., Masui T., Hijioka Y., Lim J.H., Lim C.S., Gao Q.
Name of Society : 第15回日韓中三カ国環境研究機関長会合（TPM15） (2018)
Name of Proceedings : Abstracts
Potential Study of Diversified Transportation Energy Mix in ASEAN countries

Presenter : Oka K., Mizutani W., Ichikawa S.
Name of Society : 10th Better Air Quality Conference (2018)
Name of Proceedings : 10th Better Air Quality Conference E-ABSTRACT
Associations of Perceptual temperature sensitivity and Physiological Responses to Temperature Changes with Meteoropathy

Presenter : Matsuo S., Miura R., Tomita Y., Loh P.Y., Fukuda J., Wakabayashi H., Oka K., Takakura J., Arima K., Nishimura T.
Name of Society : 17th International Congress of Physiological Anthropology (2025)
Name of Proceedings : Abstracts, 29
Projected Urban Heat Island–Attributable Mortality in Tokyo Metropolitan Area, Japan, Across Age Groups and Geographies Under Future Climate and Demographic Scenarios

Presenter : He J., Madaniyazi L., Chua P.L.C., Kim Y., Oka K., Honda Y., Hashizume M.
Name of Society : Joint Annual Meeting of the International Society of Exposure Science and the International Society for Environmental Epidemiology 2025 (2025)
Name of Proceedings : Abstracts
Machine learning approach to predict mortality reduction from summer heatstroke and heart disease through urban modification scenarios for climate change adaptation

Presenter : Ohashi Y., Nakajima K., Takane Y., Kikegawa Y., Ihara T., Oka K.
Name of Society : European Meteorological Society (EMS) Annual Meeting (2024)
Name of Proceedings : -
A Surveillance Study on Actual Situation and Factors of Air Conditioner Non-Use in the Elderly in Japan for Heat Stroke Prevention

Presenter : Fukuda J., Takakura J., Oka K., Nishimura T., Wakabayashi H.
Name of Society : The 20th International Conference on Environmental Ergonomics ICEE2024 (2024)
Name of Proceedings : Abstracts, 317-318
Interactive effects of Ozone and temperature on mortality in Japan

Presenter : Kim S.E., Honda Y., Ng C.F.S., Oka K., Nagashima T., Hashizume M.
Name of Society : The International Society for Environmental Epidemiology Asia and Western Pacific Chapter & International Society of Exposure Science Asia Chapter Joint Conference 2024 (2024)
Name of Proceedings : Abstract Book, 202-202
“Cumulative preventable number” for heat-health alert system

Presenter : Honda Y., Oka K., Hijioka Y.
Name of Society : 35th Annual Conference of the International Society for Environmental Epidemiology (2023)
Name of Proceedings : Abstract E-Book, 673
Seasonal Variations in Mortality Risk Associated with Ozone Concentrations in Tokyo, Japan

Presenter : Kim E.S., Honda Y., Hashizume M., Ng C.F.S, Oka K., Nagashima T.
Name of Society : 35th Annual Conference of the International Society for Environmental Epidemiology (2023)
Name of Proceedings : Abstract E-Book, 342
A nationwide comparative analysis of temperature effect on mortality and morbidity in Japan

Presenter : Yuan L., Madaniyazi L., Vicedo Cabrera A.M., Honda Y., Ng C.F.S, Ueda K., Oka K., Tobias A., Hashizume M.
Name of Society : 35th Annual Conference of the International Society for Environmental Epidemiology (2023)
Name of Proceedings : Abstract E-Book, 627
Short-term Effects of Ozone on the Mortality and Effect Modification by Temperature in Japan

Presenter : Kim E.S., Honda Y., Ng C.F.S., Oka K., Nagashima T., Hashizume M.
Name of Society : AGU Fall Meeting 2023 (2023)
Name of Proceedings : なし
Prediction of climate change impacts on heatstroke cases in Japan's 47 prefectures considering long-term heat adaptation

Presenter : Oka K., Honda Y., Phung V.L.H., Hijioka Y.
Name of Society : 気候変動シンポジウム「気候変動対策と未来ビジョンー適応・緩和研究の展望」 (2023)
Name of Proceedings : -
Investigating the Regional Concentrations-Response Relations between PM2.5 and Daily Mortality in Japan

Presenter : Kim S. E., Honda Y., Ng C. F. S., Oka K., Nagashima T., Hijioka Y.
Name of Society : 34th Annual Conference of the International Society for Environmental Epidemiology (2022)
Name of Proceedings : Abstract Book, 880
Method to set the wet bulb globe temperature criterion beyond which the heatstroke alert is issued

Presenter : Honda Y., Oka K., Hijioka Y.
Name of Society : 34th Annual Conference of the International Society for Environmental Epidemiology (2022)
Name of Proceedings : Abstract Book, 1124
Comparison of heat related mortality estimated using ambient temperature and wet bulb globe temperature in Japan: Supporting evidence for the heat health warning system

Presenter : Watanabe H., Honda Y., Oka K., Hashizume M., Tobias A., Kim Y.
Name of Society : 34th Annual Conference of the International Society for Environmental Epidemiology (2022)
Name of Proceedings : Abstract Book, 1411
Prediction of the impact of climate change on the heatstroke incidence in Japan with the long-term effect of heat-adaptation

Presenter : Oka K., Honda Y., Phung V., Hijioka Y.
Name of Society : The 28th AIM International Workshop (2022) (2022)
Name of Proceedings : -
Prediction of the impact of climate change on the number of heatstroke patients in Tokyo, Japan with heat-adaptation effects

Presenter : Oka K., Honda Y., Phung V., Hijioka Y.
Name of Society : 34th Annual Conference of the International Society for Environmental Epidemiology (2022)
Name of Proceedings : Abstract Book, 1416
Ambient Particulate Air Pollution and Premature Mortality in two Asian Megacities

Presenter : Kim S. E., Honda Y., Hashizume M., Ng C. F. S., Oka K., Hijioka Y., Nagashima T., Kim H.
Name of Society : The 19th International Conference of the Pacific Basin Consortium for Environment and Health (2022)
Name of Proceedings : Conference Proceedings Booklet, 73
Evaluation of Extreme Heat Events under Climate Change and its Resulting Impact on Heatstroke Cases in Japan using Generalized Extreme Value Distribution

Presenter : Oka K., Phung V., Honda, Y., Hijioka Y.
Name of Society : AGU Fall Meeting 2022 (2022)
Name of Proceedings : -
Spatial heterogeneity and the area-specific predictors in the association between particle matter air pollution and mortality in Japan

Presenter : Kim S.E., Honda Y., Hashizume M., Ng C.F.S., Nagashima T., Oka K., Hijioka Y.
Name of Society : AGU Fall Meeting 2022 (2022)
Name of Proceedings : -
Health impact assessments of vegetation fires - A systematic review

Presenter : Phung V.L.H., Park C., Phosri A., Oka K., Honda Y.
Name of Society : AGU Fall Meeting 2022 (2022)
Name of Proceedings : -
Association between PM10, smoke haze, and under-5 mortality in Klang Valley, Malaysia

Presenter : Phung V., Ueda K., Seposo X.T., Sahani M., Wan Mahiyuddin W.R., Oka K.
Name of Society : The 27th AIM International Workshop (2021)
Name of Proceedings : -
Ambient temperature and ambulance car visits in Japan by age category and severity

Presenter : Honda Y., Oka K., Hijioka Y.
Name of Society : 33rd Annual Conference of the International Society for Environmental Epidemiology (2021)
Name of Proceedings : Abstract' E-book, 421-421
Difference in heatstroke ambulance visit risk by month in Japan

Presenter : Honda Y., Oka K., Hijioka Y.
Name of Society : 32nd Annual Conference of the International Society for Environmental Epidemiology (2020)
Name of Proceedings : -
Regional concentration-response relationships between ambient PM2.5 and cause-specific mortality in Japan

Presenter : Kim S.E., Honda Y., Hijioka Y., Oka T., Hashizume M., Ng C.F.S., Nagashima T.
Name of Society : AGU 2020 Fall Meeting (2020)
Name of Proceedings : -
Developing a national platform in Asia and the role of AP-PLAT, as a Hub to connect experience and expertise

Presenter : Oka K., Fukumura Y., Hijioka Y.
Name of Society : 4th European Climate Change Adaptation conference (2019)
Name of Proceedings : -
National Adaptation Policy and Its Influence on Local Practice: Climate Change Adaptation Act

Presenter : Fukumura Y., Oka K., Hijioka Y.
Name of Society : European Climate Change Adaptation conference (2019)
Name of Proceedings : -

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Heatstroke under Climate Change and Adaptation Strategies in Japan

Presenter : Oka K.
Name of Society : 2025 Heat Early Warning System Symposium - Predicting, Monitoring & Communicating Risks of Heatwaves (2025)
Name of Proceedings : -
Climate change impacts on health and adaptation measures

Presenter : Oka K.
Name of Society : Nagasaki University International Symposium: Risk and the International Community (2025)
Name of Proceedings : -
Role and key activities of the Center for Climate Change Adaptation in Japan

Presenter : Machimura T., Masago Y., Oka K., Fujita T., Yoshida Y., Oyama T., Hijioka Y.
Name of Society : The 2023 International Joint Workshop for Sharing Climate Change Impact and Adaptation Knowledge between Korea and Japan (2023)
Current and Future Status of Heatstroke in Japan and Its Adaptations in Changing Climate and Aging Society

Presenter : Oka K.
Name of Society : APEC Population Aging and Environmental Health Policy Dialogue (2026)
Name of Proceedings : -
A project on the Impacts of Extreme Heat on Human Health and Strategies for Adaptation

Presenter : Oka K.
Name of Society : Bridging Nations, Protecting Generations: Prevention Strategies against Climate-sensitive Diseases in Elderly Populations of Japan and Germany: Workshop Planning of joint research projects (2025)
Name of Proceedings : -
Heatstroke under changing climate and adaptation measures in Japan

Presenter : Oka K.
Name of Society : Western Pacific Climate and Health Responder Course (2025)
Name of Proceedings : -
Climate Change and Health

Presenter : Oka K.
Name of Society : Topics in Environmental Health (2023)
Name of Proceedings : -
Prediction of climate change impacts on heatstroke risks

Presenter : Oka K.
Name of Society : IBM Environmental Sciences Seminar Series (2023)
Name of Proceedings : -
Prediction of heatstroke patients in Japan: proposal of heat adaptation consideration

Presenter : Oka K.
Name of Society : MoU Signing Ceremony and Kick-off Symposium on Planetary Health (2021)
Name of Proceedings : -
Sharing views on A-PLAT and AP‐Plat for adaptation

Presenter : Oka K.
Name of Society : High‐level Workshop on Climate Policy and Assessment (2019)
Name of Proceedings : -
Introduction of climate change adaptation activities at NIES

Presenter : Oka K.
Name of Society : Myles Allen教授との研究会 (2019)
Name of Proceedings : -
Activities for Climate Change Adaptation in Japan

Presenter : Oka K.
Name of Society : AHA CENTRE EXECUTIVE PROGRAMME -JAPAN STUDY VISIT 2019 (2019)
Name of Proceedings : -
Introduction of research related to energy issues

Presenter : Oka K.
Name of Society : Academic Exchange with North China Electric Power University (2019)
Name of Proceedings : -
Risks of heatstroke and early warning of heatwaves in Japan

Presenter : Oka K.
Name of Society : 2025 Balaton Group Meeting (2025)
Name of Proceedings : -
Heatstroke under changing climate and adaptation measures in Japan

Presenter : Oka K.
Name of Society : Expo 2025 Osaka - Health and Well-being Week, HEALTH AND CLIMATE CHANGE: THE GREATEST CHALLENGE OF OUR TIME (2025)
Name of Proceedings : -

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OKA Kazutaka

Research Subject

Fiscal Year: 2025

Fiscal Year: 2024

Fiscal Year: 2023

Fiscal Year: 2022

Fiscal Year: 2021

Fiscal Year: 2020

Fiscal Year: 2019

Fiscal Year: 2018

Research Result (Publication)

Research Result (Presentation)