【As of Nov 20, 2025】

HAYASHI Takehiko

Researcher Name: HAYASHI Takehiko

Div (Section) name/title: Social Systems Division（Environmental Policy Section）／Chief Senior Researcher

Research Subject: Risk assessment of environmental chemicals

Degree(s): Dr (Science)

Professional Qualification(s): Biology

Environmental Speciality Field: risk assessment,probabilistic risk analysis

Research Subject

Fiscal Year: 2025
- 27194 : Social Systems Domain
- 27198 : Decarbonized and Sustainable Society Research Program
- 27217 : Research project on the ecological impact and factor analysis considering vulnerability
- 27220 : Research on the development of comprehensive indexes of health risk and ecological risk
- 27223 : Development of a regional evaluation tool to resolve regional and lifestyle issues and achieve sustainability goals simultaneously
- 27239 : Establishing a Regime Inclusive of Future Generations in a Sustainable Society
- 27246 : Social systems domain: Foresight and advanced basic research
- 27251 : Social systems domain: Policy-oriented research
- 27252 : Social systems domain: Intellectual research infrastructure development
- 27394 : Comprehensive Japanese nitrogen management for reducing nitrogen waste
- 27436 : Causal discovery and its applications for reliable AI
- 27547 : Research on the Application of Benchmark Dose Methods Using a Bayesian Approach: Food Health Impact Assessment Technology Research
- 27551 : Development of New Approaches to Environmental Economics and Evaluation
Fiscal Year: 2024
- 26811 : Decarbonized and Sustainable Society Research Program
- 26831 : Research project on the ecological impact and factor analysis considering vulnerability
- 26835 : Research on the development of comprehensive indexes of health risk and ecological risk
- 26839 : Development of a regional evaluation tool to resolve regional and lifestyle issues and achieve sustainability goals simultaneously
- 26855 : Establishing a Regime Inclusive of Future Generations in a Sustainable Society
- 26862 : Social systems domain: Foresight and advanced basic research
- 26870 : Social systems domain: Policy-oriented research
- 26872 : Social systems domain: Intellectual research infrastructure development
- 27039 : Causal discovery and its applications for reliable AI
- 27042 : Comprehensive Japanese nitrogen management for reducing nitrogen waste
- 27045 : Development of New Approaches to Environmental Economics and Evaluation
- 27067 : Research on issues related to the implementation of state-of-the-art benchmarking methods in risk assessment
Fiscal Year: 2023
- 26406 : Decarbonized and Sustainable Society Research Program
- 26421 : Research project on the ecological impact and factor analysis considering vulnerability
- 26424 : Research on the development of comprehensive indexes of health risk and ecological risk
- 26427 : Development of a regional evaluation tool to resolve regional and lifestyle issues and achieve sustainability goals simultaneously
- 26440 : Establishing a Regime Inclusive of Future Generations in a Sustainable Society
- 26452 : Social systems domain: Foresight and advanced basic research
- 26457 : Social systems domain: Policy-oriented research
- 26458 : Social systems domain: Intellectual research infrastructure development
- 26464 : Causal discovery and its applications for reliable AI
- 26563 : Development of New Approaches to Environmental Economics and Evaluation
- 26667 : Comprehensive Japanese nitrogen management for reducing nitrogen waste
- 26744 : Establishing ELSI for strategies of developing and promoting decarbonization technologies in Japan
- 26774 : Research on issues related to the implementation of state-of-the-art benchmarking methods in risk assessment
Fiscal Year: 2022
- 25974 : Research project on the ecological impact and factor analysis considering vulnerability
- 25977 : Research on the development of comprehensive indexes of health risk and ecological risk
- 25984 : Decarbonized and Sustainable Society Research Program
- 25987 : Establishing a Regime Inclusive of Future Generations in a Sustainable Society
- 25991 : Development of a regional evaluation tool to resolve regional and lifestyle issues and achieve sustainability goals simultaneously
- 26016 : Social systems domain: Foresight and advanced basic research
- 26017 : Social systems domain: Policy-oriented research
- 26018 : Social systems domain: Intellectual research infrastructure development
- 26096 : Development of New Approaches to Environmental Economics and Evaluation
- 26189 : Establishing ELSI for strategies of developing and promoting decarbonization technologies in Japan
- 26244 : Advancement of higher education policy and research through a critical review of EBPM and its potential application to EIPM
- 26245 : Risk prediction of mercury exposure to humans under Minamata Convention
- 26257 : Water level operation for ecosystem regime management of lakes
- 26381 : Causal discovery and its applications for reliable AI
- 26383 : Rethinking quantitative analysis in the social sciences: Mathematical development and verification of evaluation and interpretation of explanations
Fiscal Year: 2021
- 25504 : Decarbonized and Sustainable Society Research Program
- 25518 : Study on ecological impact and factor analysis considering vulnerability
- 25521 : Research on the development of comprehensive indexes of health risk and ecological risk
- 25524 : Development of a regional evaluation tool to resolve regional and lifestyle issues and achieve sustainability goals simultaneously
- 25534 : Establishing a Regime Inclusive of Future Generations in a Sustainable Society
- 25708 : Social systems domain: Foresight and advanced basic research
- 25709 : Social systems domain: Policy-oriented research
- 25710 : Social systems domain: Intellectual research infrastructure development
- 25774 : Water level operation for ecosystem regime management of lakes
- 25834 : Development of New Approaches to Environmental Economics and Evaluation
- 25878 : Establishing ELSI for strategies of developing and promoting decarbonization technologies in Japan
Fiscal Year: 2020
- 25098 : Harmonization with Nature Research Program
- 25099 : Research Program on Health and Environmental Safety
- 25126 : Social Dialogue and Co-production Office
- 25143 : Ecological Risk Assessment and Management Based on Ecological Models
- 25144 : Project to Build a System Evaluating Ecological Effect Comprehensively and Effectively
- 25151 : Policy Evaluation for Environmentally Sustainable Society
- 25202 : Development of new Approaches to Environmental Economics and Evaluation
- 25307 : Assessment of future transition of health risk from mercury
- 25308 : Advancement of higher education policy and research through a critical review of EBPM and its potential application to EIPM
- 25365 : Upgrade of Ecotoxicity Testing and Development of Novel System to Evaluate Ecotoxicological Effects of Chemicals
- 25457 : The construction of ELSI and intervention of expert knowledge in the contemporary media environment
- 25460 : Human resource development and research on epidemiological methods of infectious disease surveillance for coronaviruses and other infectious diseases, with a view to fundamentally expanding the surveillance system for these diseases
Fiscal Year: 2019
- 24695 : Harmonization with Nature Research Program
- 24696 : Research Program on Health and Environmental Safety
- 24723 : Ecological Risk Assessment and Management Based on Ecological Models
- 24724 : Project to Build a System Evaluating Ecological Effect Comprehensively and Effectively
- 24759 : Social Dialogue and Co-production Office
- 24957 : Development of new Approaches to Environmental Economics and Evaluation
- 25005 : Scientific clarification and countermeasure to ecological impacts of pesticides on dragonflies
- 25020 : Upgrade of Ecotoxicity Testing and Development of Novel System to Evaluate Ecotoxicological Effects of Chemicals
Fiscal Year: 2018
- 24306 : Ecological risk assessment and management based on ecological models
- 24307 : Project to build a system evaluating ecological effect comprehensively and effectively
- 24342 : Social Dialogue and Co-production Office
- 24354 : Harmonization with Nature Research Program
- 24355 : Research program on health and environmental safety
- 24375 : Development of new approaches to environmental economics and evaluation
- 24451 : Scientific Clarification and Countermeasure to Ecological Impacts of Pesticides on Dragonflies
- 24490 : Evidence-Based Policy Making in Environmental Studies: Conceptual analysis of Evidence and development of application guidance
- 24532 : Upgrade of ecotoxicity testing and development of novel system to evaluate ecotoxicological effects of chemicals
Fiscal Year: 2017
- 23821 : Project to build a system evaluating ecological effect comprehensively and effectively
- 23822 : Ecological risk assessment and management based on ecological models
- 23845 : Harmonization with Nature Research Program
- 23847 : Research program on health and environmental safety
- 23863 : Social Dialogue and Co-production Office
- 24001 : Development of new approaches to environmental economics and evaluation
- 24067 : Upgrade of ecotoxicity testing and development of novel system to evaluate ecotoxicological effects of chemicals
- 24192 : Scientific Clarification and Countermeasure to Ecological Impacts of Pesticides on Dragonflies
Fiscal Year: 2016
- 23408 : Harmonization with Nature Research Program
- 23414 : Research program on health and environmental safety
- 23417 : Ecological risk assessment and management based on ecological models
- 23418 : Project to build a system evaluating ecological effect comprehensively and effectively
- 23572 : Upgrade of ecotoxicity testing and development of novel system to evaluate ecotoxicological effects of chemicals
- 23713 : The Study about a New Evaluation System of the Ecological Effect with Chemicals.
Fiscal Year: 2015
- 23000 : Studies on the ecological risk assessment and management of pollutant chemicals
- 23002 : Study on strategic approach of chemical risk management and control
- 23028 : Reference laboratory for ecotoxicity test, chemical database for environmental risk
- 23148 : Development of methodology for predicting ecotoxicity for risk assessment/management of chemicals
- 23179 : Assessment of environmental impacts on terrestrial insects caused by neonicotinoid insecticides
- 23213 : Development of an integrated assessment for investigating pesticide effects on biodiversity in paddy fields
- 23230 : Development and publication of databases of chemical information
- 23237 : Development of comprehensive ecological risk assessment methods considering metal specificity
- 23241 : The Study about a New Evaluation System of the Ecological Effect with Chemicals.
- 23242 : The reinforcement as the standard organization about the examination for ecological effect (Reference Laboratory)
- 23246 : Fundamental research for risk assessment of chemicals
- 23330 : Supporting on the environmental risk assessment of chemical substances for the purpose of control and regulation
- 23343 : Implementation of initial risk assessment of environmental chemicals in FY2015
Fiscal Year: 2014
- 22588 : Studies on the ecological risk assessment and management of pollutant chemicals
- 22590 : Study on strategic approach of chemical risk management and control
- 22616 : Reference laboratory for ecotoxicity test, chemical database for environmental risk
- 22763 : Assessment of environmental impacts on terrestrial insects caused by neonicotinoid insecticides
- 22766 : Development of methodology for predicting ecotoxicity for risk assessment/management of chemicals
- 22792 : Development of an integrated assessment for investigating pesticide effects on biodiversity in paddy fields
- 22793 : Development of comprehensive ecological risk assessment methods considering metal specificity
- 22799 : Development and publication of databases of chemical information
- 22836 : The reinforcement as the standard organization about the examination for ecological effect (Reference Laboratory)
- 22930 : Fundamental research for risk assessment of chemicals
- 22933 : Implementation of initial risk assessment of environmental chemicals in FY 2014
- 22936 : Investigation and information gathering on toxic substances related to ecological hazard for aquatic species in FY 2014
- 22940 : Supporting on the environmental risk assessment of chemical substances for the purpose of control and regulation
Fiscal Year: 2013
- 22172 : Studies on the ecological risk assessment and management of pollutant chemicals
- 22174 : Study on strategic approach of chemical risk management and control
- 22200 : Reference laboratory for ecotoxicity test, chemical database for environmental risk
- 22220 : Development of an integrated assessment for investigating pesticide effects on biodiversity in paddy fields
- 22225 : Development of comprehensive ecological risk assessment methods considering metal specificity
- 22315 : Development of methodology for predicting ecotoxicity for risk assessment/management of chemicals
- 22343 : Supporting on the environmental risk assessment of chemical substances for the purpose of control and regulation
- 22344 : Implementation of initial risk assessment of environmental chemicals in FY 2013
- 22364 : The reinforcement as the standard organization about the examination for ecological effect (Reference Laboratory)
- 22437 : Development and publication of databases of chemical information
- 22484 : Fundamental research for risk assessment of chemicals
Fiscal Year: 2012
- 21743 : Studies on the ecological risk assessment and management of pollutant chemicals
- 21745 : Study on strategic approach of chemical risk management and control
- 21771 : Reference laboratory for ecotoxicity test, chemical database for environmental risk
- 21977 : Development and publication of databases of chemical information
- 22004 : Development of comprehensive ecological risk assessment methods considering metal specificity
- 22083 : Development of methodology for predicting ecotoxicity for risk assessment/management of chemicals
- 22084 : Fundamental research for risk assessment of chemicals
- 22085 : The reinforcement as the standard organization about the examination for ecological effect (Reference Laboratory)
- 22131 : Investigation and information gathering on toxic substances related to ecological hazard for aquatic species in FY 2012
Fiscal Year: 2011
- 21300 : Studies on the ecological risk assessment and management of pollutant chemicals
- 21302 : Study on strategic approach of chemical risk management and control
- 21329 : Reference laboratory for ecotoxicity test, chemical database for environmental risk
- 21482 : Development and publication of databases of chemical information
- 21494 : The reinforcement as the standard organization about the examination for ecological effect (Reference Laboratory)
- 21510 : Fundamental research for risk assessment of chemicals
- 21526 : Investigation and information gathering on toxic substances related to ecological hazard for aquatic species in FY 2011
- 21533 : Development of methodology for predicting ecotoxicity for risk assessment/management of chemicals
- 21540 : Quantitative environmental risk assessment and cost/benefit analysis of chemical pollutants
- 21546 : Investigation on subjects associated with implementation of Chemical control law in FY 2011
Fiscal Year: 2010
- 20905 : Ecological risk assessment of heavy metals considering bioavailability
- 20907 : Integrated exposure assessment analysis of the complex factors of chemical exposure
- 20973 : Quantitative environmental risk assessment and cost/benefit analysis of chemical pollutants
Fiscal Year: 2009
- 20530 : Global Eco-Risk Management from Asian Viewpoints
- 20558 : Integrated exposure assessment analysis of the complex factors of chemical exposure
- 20806 : Development of a Bayesian approach to probabilistic ecological risk assessment
- 20807 : Ecological risk assessment of heavy metals considering bioavailability
Fiscal Year: 2008
- 20377 : Global Eco-Risk Management from Asian Viewpoints

View all

Research Result (Publication)

all
Original Paper
Review
Other Publications

Original Paper
Statistical causal discovery in developing adverse outcome pathway

Presenter : Hiki K., Pham T., Yamamoto M., Hayashi T., Shimizu S.
Title : , Environmental Toxicology and Chemistry, 45:1988-1999 (2026)
Original Paper
Experimental test of the effects of prolonged flooding practices on animal communities in rice paddy fields

Presenter : Nakanishi K., Akanuma H., Kobayashi R., Yokomizo H., Hayashi T., Robson B., Usio N.
Title : , Agriculture, Ecosystems & Environment, 379:109369 (2025)
Original Paper
Spatiotemporal trends and ecological risk assessment of volatile methylsiloxanes in Tokyo Bay catchment basin, Japan: River water and sewage treatment plant samples

Presenter : Horii Y., Sakurai T., Imaizumi Y., Kuroda K., Hayashi T. I., Nishino T., Takemine S., Ohtsuka N.
Title : , Science of the Total Environment, 179292 (2025)
Original Paper
Compiling scientific risk assessment and normative analyses in a single chart: development of a framework including exposure-pathway-targets and value arguments

Presenter : Hayashi T., Hartwig M.G., Emori S., Sano W.
Title : , Human and Ecological Risk Assessment, 31(5-6):635-655 (2025)
Original Paper
Reduced mortality during the COVID-19 outbreak in Japan, 2020: a two-stage interrupted time-series design

Presenter : Onozuka D., Tanoue Y., Nomura S., Kawashima T., Yoneoka D., Eguchi A., Sheng Ng C.F., Matsuura K., Shi S., Makiyama K., Uryu S., Kawamura Y., Takayanagi S., Gilmour S., Hayashi T.I., Miyata H., Sera F., Sunagawa T., Takahashi T., Tsuchihashi Y., Kobayashi Y., Arima Y., Kanou K., Suzuki M., Hashizume M.
Title : , International Journal of Epidemiology, 75-84 (2022)
Original Paper
Illustrating a species sensitivity distribution for nano- and microplastic particles using Bayesian hierarchical modeling

Presenter : Takeshita K., Iwasaki Y., Sinclair T. M., Hayashi T., Naito W.
Title : , Environmental Toxicology and Chemisrty, 41(4):954-960 (2022)
Original Paper
Inferring causal impacts of extreme water-level drawdowns on lake water clarity using long-term monitoring data

Presenter : Nakanishi K., Yokomizo H., Fukaya K., Kadoya T., Matsuzaki S., Nishihiro J., Kohzu A., Hayashi T.
Title : , Science of The Total Environment, 838(2): (2022)
Original Paper
What do we want to estimate from observational datasets? Choosing appropriate statistical analysis methods based on the chemical management phase

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Title : , Integrated Environmental Assessment and Management, 18(5):1414-1422 (2022)
Original Paper
Quantitative analyses of misclassification rates in the hazard classification of environmental chemicals: Evaluation of procedures for deriving predicted no-effect concentrations in the Chemical Substance Control Law in Japan

Presenter : Hayashi T., Furuhama A., Yokomizo H., Yamamoto H.
Title : , Risk analysis (2022)
Original Paper
Revisiting assessment factors for species sensitivity distributions as a function of sample size and variation in species sensitivity

Presenter : Kamo M., Iwasaki Y., Hayashi T.
Title : , Ecotoxicology and Environmental Safety, 246:114170 (2022)
Original Paper
A framework for implementing evidence in policymaking: Perspectives and phases of evidence evaluation in the science-policy interaction

Presenter : Kano H., Hayashi T.I.
Title : , Environmental Science and Policy, 116:86-95 (2021)
Original Paper
Population model analyses of the combined effects of insecticide use and habitat degradation on the past sharp declines of the dragonfly Sympetrum frequens

Presenter : Nakanishi K., Yokomizo H., Hayashi T.
Title : , Science of The Total Environment, 787(147526): (2021)
Other Publications
Strategy for development of quantitative structure-activity-activity relationship models for chronic fish toxicity: prediction of early-life stage toxicity to Oryzias latipes from acute Daphnia magna toxicity

Presenter : Furuhama A., Hayashi T. I., Yamamoto H.
Title : , Japan Journal of Environmental Toxicology, 24:33-42 (2021)
Other Publications
Chlorantraniliprole application differentially affects adult emergence of Sympetrum dragonflies in rice paddy fields.

Presenter : Nakanishi K., Usio N., Yokomizo H., Takashima T., Hayashi T.
Title : , Paddy and Water Environment (2021)
Original Paper
Suicide by gender and 10-year age groups during the COVID-19 pandemic vs previous five years in Japan: An analysis of national vital statistics

Presenter : Akifumi E., Nomura S., Gilmour S., Harada N., Sakamoto H., Ueda P., Yoneoka D., Tanoue Y., Kawashima T., Hayashi T.I., Arima Y., Suzuki M., Hashizume M.
Title : , Psychiatry research, 305:114173-114173 (2021)
Original Paper
Effects of systemic insecticides on the population dynamics of the dragonfly Sympetrum frequens in Japan: Statistical analyses using field census data from 2009 to 2016

Presenter : Nakanishi K., Ueda T., Yokomizo H., Hayashi T.
Title : , Science of The Total Environment, 703:134499 (2020)
Original Paper
The effect of intervention in nickel concentrations on benthic macroinvertebrates: A case study of statistical causal inference in ecotoxicology

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Title : , Environmental Pollution, 265(115059): (2020)
Original Paper
Evaluation of interregional consistency in associations between neonicotinoid insecticides and functions of benthic invertebrate communities in rivers in urban rice-paddy areas

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Title : , Science of the Total Environment, 743(140627): (2020)
Review
Reviews on common objectives and evaluation indicators for risk communication activities from 2011 to 2017

Presenter : Sato A., Honda K., Ono K., Kanda R., Hayashi T., Takeda Y., Takebayashi Y., Koboyashi T., Murakami M.
Title : , PeerJ (2020)
Original Paper
Investigating effect of climate warming on the population declines of Sympetrum frequens during the 1990s in three regions in Japan

Presenter : Nakanishi K., Koide D., Yokomizo H., Kadoya T., Hayashi T.
Title : , Scientific Reports, 10(12719): (2020)
Original Paper
Long-term monitoring reveals among-year consistency in the ecological impacts of insecticides on animal communities in paddies

Presenter : Hashimoto K., Kasai A., Hayasaka D., Goka K., Hayashi T.
Title : , Ecological Indicators, 113(106227): (2020)
Other Publications
Concerns about reproducibility, use of the Akaike information criterion, and related issues in Hoondert et al. 2019

Presenter : Iwasaki Y., Hayashi T.
Title : , Environmental Toxicology and Chemistry, 39(7):1300-1301 (2020)
Original Paper
Georeferenced multimedia environmental fate of volatile methylsiloxanes modeled in the populous Tokyo Bay catchment basin

Presenter : Sakurai T., Imaizumi Y., Kuroda K., Hayashi T., Suzuki N.
Title : , Science of the Total Environment, 689:843-853 (2019)
Original Paper
Associations of community structure and functions of benthic invertebrates with nickel concentrations: analyses from field surveys

Presenter : Takeshita K., Misaki T., Hayashi T., Yokomizo H.
Title : , Environmental Toxicology and Chemistry, 38(8):1728-1737 (2019)
Original Paper
Model construction for estimating potential vulnerability of Japanese soils to cadmium pollution based on intact soil properties

Presenter : Ono K., Yasutaka T., Hayashi TI., Kamo M., Iwasaki Y., Nakamori T., Fujii Y., Kamitani T.
Title : , PLoS ONE, 14(6): (2019)
Original Paper
Effects of fipronil on non-target ants and other invertebrates in a program for eradication of the Argentine ant, Linepithema humile

Presenter : Sakamoto Y., Hayashi T., Inoue M.N., Ohnishi H., Kishimoto T., Goka K.
Title : , Sociobiology, 66(2):227-238 (2019)
Original Paper
Development of QSAAR and QAAR models for predicting fish early-life stage toxicity with a focus on industrial chemicals

Presenter : Furuhama A., Hayashi T., Yamamoto H.
Title : , SAR and QSAR in Environmental Research , 30(11):825-846 (2019)
Original Paper
Were the sharp declines of dragonfly populations in the 1990s in Japan caused by fipronil and imidacloprid? An analysis of Hill’s causality for the case of Sympetrum frequens

Presenter : Nakanishi K., Yokomizo H., Hayashi T.
Title : , Environmental Science and Pollution Research, 25(35):35352-35364 (2018)
Original Paper
Development of models to predict fish early-life stage toxicity from acute Daphnia magna toxicity

Presenter : Furuhama A., Hayashi T., Yamamoto H.
Title : , SAR and QSAR in Environmental Research, 29(9):725-742 (2018)
Other Publications
Multivariate Analysis of Water Quality and Ecotoxicity to Aquatic Species in the Yoshino River and the Yodo River Basin, Japan

Presenter : Tamura I., Hayashi T., Nishi-ie S., Enyama M., Mitsuyama M., Tatarazako N., Yamamoto H.
Title : , 学会誌「EICA」, 23(2,3):75-85 (2018)
Original Paper
External validation of acute-to-chronic models for estimation of reproductive toxicity to Daphnia magna

Presenter : Furuhama A., Hayashi T., Yamamoto H., Tatarazako N.
Title : , SAR and QSAR in Environmental Research, 28(9):765-781 (2017)
Other Publications
Need for Systematic Statistical Tools for Decision-Making in Radioactively Contaminated Areas

Presenter : Matsuzaki S., Kumagai N., Hayashi T.
Title : , Environmental Science Technology, 50:1075-1076 (2016)
Original Paper
ECOLOGICAL RISK ASSESSMENT OF HERBICIDES IN JAPAN: INTEGRATING SPATIOTEMPORAL VARIATION IN EXPOSURE AND EFFECTS USING A MULTIMEDIA MODEL AND ALGAL DENSITY DYNAMICS MODELS

Presenter : Hayashi TI., Imaizumi Y., Yokomizo H., Tatarazako N., Suzuki N.
Title : , Environmental Toxicology and Chemistry, 35(1):233-240 (2016)
Original Paper
Fipronil application on rice paddy fields reduces densities of common skimmer and scarlet skimmer

Presenter : Kasai A., Hayashi T.I., Onishi H., Suzuki K., Hayasaka D., Goka K.
Title : , Scientific Reports, 6:23055 (2016)
Original Paper
Predicting algal growth inhibition toxicity: three-step strategy using structural and physicochemical properties

Presenter : Furuhama A., Hasunuma K., Hayashi T., Tatarazako N.
Title : , SAR and QSAR in Environmental Research, 27(5):343-362 (2016)
Original Paper
Acute to chronic toxicity estimations of Daphnia magna toxicity within the QSAAR framework

Presenter : Furuhama A., Hayashi T., Tatarazako N.
Title : , SAR and QSAR in Environmental Research, 27(10):833-850 (2016)
Original Paper
Estimating population-level HC5 for copper using a species sensitivity distribution approach

Presenter : Iwasaki Y., Hayashi T., Kamo M.
Title : , Environmental Toxicology and Chemistry, 32(6):1396-1402 (2013)
Original Paper
Applying biotic ligand models and Bayesian techniques: Ecological risk assessment copper and nickel in Tokyo rivers

Presenter : Hayashi T.I.
Title : , Integrated Environmental Assessment and Management, 9:63-69 (2012)
Original Paper
A Bayesian approach to probabilistic ecological risk assessment: risk comparison of nine toxic substances in Tokyo surface waters

Presenter : Hayashi T.I., Kashiwagi N.
Title : , Environ.Sci.Pollut.Res., 18(3):365-375 (2011)
Review
Adding value to ecological risk assessment with population modeling

Presenter : Forbes V.E., Calow P., Grimm V., Hayashi T.I., Jager T., Katholm A., Palmqvist A., Pastrok R., Salvito D., Sibly R., Spromberg J., Stark J., Stillman R.A.
Title : , Human and Ecological Risk Assessment, 17(2):287-299 (2011)
Original Paper
Potential effects of life-history evolution on ecological risk assessment

Presenter : Kamo M., Hayashi T.I., Akita T.
Title : , Ecological Applications, 21(8):3191-3198 (2011)
Original Paper
Comparison of population-level effects of heavy metals on fathead minnow (Pimephales promelas)

Presenter : Iwasaki Y., Hayashi T., Kamo M.
Title : , Ecotoxicol.Environ.Saf., 73(4):465-471 (2010)
Other Publications
Integrating population modeling into ecological risk assessment

Presenter : Forbes V.E., Calow P., Grimm V, Hayashi T., Jager T., Palmqvist A., Pastrok R., Salvito D., Sibly R., Spromberg J., Stark J., Stillman R.A.
Title : , Integr.Environ.Assess.Manag., 6(1):191-193 (2010)
Original Paper
A bayesian method for deriving species-sensitivity distributions: Selecting the best-fit tolerance distributions of taxonomic groups

Presenter : Hayashi T., Kashiwagi N.
Title : , Hum.Ecol.Risk Assess., 16(2):251-263 (2010)
Original Paper
Population-level ecological effect assessment: estimating the effect of toxic chemicals on density-dependent populations

Presenter : Hayashi T., Kamo M, Tanaka Y.
Title : , Ecol.Res., 24(5):945-954 (2009)
Other Publications
Examining the relationship between chemical concentration and equilibrium population size

Presenter : Hayashi T.I., Kamo M, Tanaka Y.
Title : , Australas.J.Ecotoxicol., 14:31-35 (2009)

View all

Statistical causal discovery in developing adverse outcome pathway

Presenter : Hiki K., Pham T., Yamamoto M., Hayashi T., Shimizu S.
Title : , Environmental Toxicology and Chemistry, 45:1988-1999 (2026)
Experimental test of the effects of prolonged flooding practices on animal communities in rice paddy fields

Presenter : Nakanishi K., Akanuma H., Kobayashi R., Yokomizo H., Hayashi T., Robson B., Usio N.
Title : , Agriculture, Ecosystems & Environment, 379:109369 (2025)
Spatiotemporal trends and ecological risk assessment of volatile methylsiloxanes in Tokyo Bay catchment basin, Japan: River water and sewage treatment plant samples

Presenter : Horii Y., Sakurai T., Imaizumi Y., Kuroda K., Hayashi T. I., Nishino T., Takemine S., Ohtsuka N.
Title : , Science of the Total Environment, 179292 (2025)
Compiling scientific risk assessment and normative analyses in a single chart: development of a framework including exposure-pathway-targets and value arguments

Presenter : Hayashi T., Hartwig M.G., Emori S., Sano W.
Title : , Human and Ecological Risk Assessment, 31(5-6):635-655 (2025)
Reduced mortality during the COVID-19 outbreak in Japan, 2020: a two-stage interrupted time-series design

Presenter : Onozuka D., Tanoue Y., Nomura S., Kawashima T., Yoneoka D., Eguchi A., Sheng Ng C.F., Matsuura K., Shi S., Makiyama K., Uryu S., Kawamura Y., Takayanagi S., Gilmour S., Hayashi T.I., Miyata H., Sera F., Sunagawa T., Takahashi T., Tsuchihashi Y., Kobayashi Y., Arima Y., Kanou K., Suzuki M., Hashizume M.
Title : , International Journal of Epidemiology, 75-84 (2022)
Illustrating a species sensitivity distribution for nano- and microplastic particles using Bayesian hierarchical modeling

Presenter : Takeshita K., Iwasaki Y., Sinclair T. M., Hayashi T., Naito W.
Title : , Environmental Toxicology and Chemisrty, 41(4):954-960 (2022)
Inferring causal impacts of extreme water-level drawdowns on lake water clarity using long-term monitoring data

Presenter : Nakanishi K., Yokomizo H., Fukaya K., Kadoya T., Matsuzaki S., Nishihiro J., Kohzu A., Hayashi T.
Title : , Science of The Total Environment, 838(2): (2022)
What do we want to estimate from observational datasets? Choosing appropriate statistical analysis methods based on the chemical management phase

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Title : , Integrated Environmental Assessment and Management, 18(5):1414-1422 (2022)
Quantitative analyses of misclassification rates in the hazard classification of environmental chemicals: Evaluation of procedures for deriving predicted no-effect concentrations in the Chemical Substance Control Law in Japan

Presenter : Hayashi T., Furuhama A., Yokomizo H., Yamamoto H.
Title : , Risk analysis (2022)
Revisiting assessment factors for species sensitivity distributions as a function of sample size and variation in species sensitivity

Presenter : Kamo M., Iwasaki Y., Hayashi T.
Title : , Ecotoxicology and Environmental Safety, 246:114170 (2022)
A framework for implementing evidence in policymaking: Perspectives and phases of evidence evaluation in the science-policy interaction

Presenter : Kano H., Hayashi T.I.
Title : , Environmental Science and Policy, 116:86-95 (2021)
Population model analyses of the combined effects of insecticide use and habitat degradation on the past sharp declines of the dragonfly Sympetrum frequens

Presenter : Nakanishi K., Yokomizo H., Hayashi T.
Title : , Science of The Total Environment, 787(147526): (2021)
Suicide by gender and 10-year age groups during the COVID-19 pandemic vs previous five years in Japan: An analysis of national vital statistics

Presenter : Akifumi E., Nomura S., Gilmour S., Harada N., Sakamoto H., Ueda P., Yoneoka D., Tanoue Y., Kawashima T., Hayashi T.I., Arima Y., Suzuki M., Hashizume M.
Title : , Psychiatry research, 305:114173-114173 (2021)
Effects of systemic insecticides on the population dynamics of the dragonfly Sympetrum frequens in Japan: Statistical analyses using field census data from 2009 to 2016

Presenter : Nakanishi K., Ueda T., Yokomizo H., Hayashi T.
Title : , Science of The Total Environment, 703:134499 (2020)
The effect of intervention in nickel concentrations on benthic macroinvertebrates: A case study of statistical causal inference in ecotoxicology

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Title : , Environmental Pollution, 265(115059): (2020)
Evaluation of interregional consistency in associations between neonicotinoid insecticides and functions of benthic invertebrate communities in rivers in urban rice-paddy areas

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Title : , Science of the Total Environment, 743(140627): (2020)
Investigating effect of climate warming on the population declines of Sympetrum frequens during the 1990s in three regions in Japan

Presenter : Nakanishi K., Koide D., Yokomizo H., Kadoya T., Hayashi T.
Title : , Scientific Reports, 10(12719): (2020)
Long-term monitoring reveals among-year consistency in the ecological impacts of insecticides on animal communities in paddies

Presenter : Hashimoto K., Kasai A., Hayasaka D., Goka K., Hayashi T.
Title : , Ecological Indicators, 113(106227): (2020)
Georeferenced multimedia environmental fate of volatile methylsiloxanes modeled in the populous Tokyo Bay catchment basin

Presenter : Sakurai T., Imaizumi Y., Kuroda K., Hayashi T., Suzuki N.
Title : , Science of the Total Environment, 689:843-853 (2019)
Associations of community structure and functions of benthic invertebrates with nickel concentrations: analyses from field surveys

Presenter : Takeshita K., Misaki T., Hayashi T., Yokomizo H.
Title : , Environmental Toxicology and Chemistry, 38(8):1728-1737 (2019)
Model construction for estimating potential vulnerability of Japanese soils to cadmium pollution based on intact soil properties

Presenter : Ono K., Yasutaka T., Hayashi TI., Kamo M., Iwasaki Y., Nakamori T., Fujii Y., Kamitani T.
Title : , PLoS ONE, 14(6): (2019)
Effects of fipronil on non-target ants and other invertebrates in a program for eradication of the Argentine ant, Linepithema humile

Presenter : Sakamoto Y., Hayashi T., Inoue M.N., Ohnishi H., Kishimoto T., Goka K.
Title : , Sociobiology, 66(2):227-238 (2019)
Development of QSAAR and QAAR models for predicting fish early-life stage toxicity with a focus on industrial chemicals

Presenter : Furuhama A., Hayashi T., Yamamoto H.
Title : , SAR and QSAR in Environmental Research , 30(11):825-846 (2019)
Were the sharp declines of dragonfly populations in the 1990s in Japan caused by fipronil and imidacloprid? An analysis of Hill’s causality for the case of Sympetrum frequens

Presenter : Nakanishi K., Yokomizo H., Hayashi T.
Title : , Environmental Science and Pollution Research, 25(35):35352-35364 (2018)
Development of models to predict fish early-life stage toxicity from acute Daphnia magna toxicity

Presenter : Furuhama A., Hayashi T., Yamamoto H.
Title : , SAR and QSAR in Environmental Research, 29(9):725-742 (2018)
External validation of acute-to-chronic models for estimation of reproductive toxicity to Daphnia magna

Presenter : Furuhama A., Hayashi T., Yamamoto H., Tatarazako N.
Title : , SAR and QSAR in Environmental Research, 28(9):765-781 (2017)
ECOLOGICAL RISK ASSESSMENT OF HERBICIDES IN JAPAN: INTEGRATING SPATIOTEMPORAL VARIATION IN EXPOSURE AND EFFECTS USING A MULTIMEDIA MODEL AND ALGAL DENSITY DYNAMICS MODELS

Presenter : Hayashi TI., Imaizumi Y., Yokomizo H., Tatarazako N., Suzuki N.
Title : , Environmental Toxicology and Chemistry, 35(1):233-240 (2016)
Fipronil application on rice paddy fields reduces densities of common skimmer and scarlet skimmer

Presenter : Kasai A., Hayashi T.I., Onishi H., Suzuki K., Hayasaka D., Goka K.
Title : , Scientific Reports, 6:23055 (2016)
Predicting algal growth inhibition toxicity: three-step strategy using structural and physicochemical properties

Presenter : Furuhama A., Hasunuma K., Hayashi T., Tatarazako N.
Title : , SAR and QSAR in Environmental Research, 27(5):343-362 (2016)
Acute to chronic toxicity estimations of Daphnia magna toxicity within the QSAAR framework

Presenter : Furuhama A., Hayashi T., Tatarazako N.
Title : , SAR and QSAR in Environmental Research, 27(10):833-850 (2016)
Estimating population-level HC5 for copper using a species sensitivity distribution approach

Presenter : Iwasaki Y., Hayashi T., Kamo M.
Title : , Environmental Toxicology and Chemistry, 32(6):1396-1402 (2013)
Applying biotic ligand models and Bayesian techniques: Ecological risk assessment copper and nickel in Tokyo rivers

Presenter : Hayashi T.I.
Title : , Integrated Environmental Assessment and Management, 9:63-69 (2012)
A Bayesian approach to probabilistic ecological risk assessment: risk comparison of nine toxic substances in Tokyo surface waters

Presenter : Hayashi T.I., Kashiwagi N.
Title : , Environ.Sci.Pollut.Res., 18(3):365-375 (2011)
Potential effects of life-history evolution on ecological risk assessment

Presenter : Kamo M., Hayashi T.I., Akita T.
Title : , Ecological Applications, 21(8):3191-3198 (2011)
Comparison of population-level effects of heavy metals on fathead minnow (Pimephales promelas)

Presenter : Iwasaki Y., Hayashi T., Kamo M.
Title : , Ecotoxicol.Environ.Saf., 73(4):465-471 (2010)
A bayesian method for deriving species-sensitivity distributions: Selecting the best-fit tolerance distributions of taxonomic groups

Presenter : Hayashi T., Kashiwagi N.
Title : , Hum.Ecol.Risk Assess., 16(2):251-263 (2010)
Population-level ecological effect assessment: estimating the effect of toxic chemicals on density-dependent populations

Presenter : Hayashi T., Kamo M, Tanaka Y.
Title : , Ecol.Res., 24(5):945-954 (2009)

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Reviews on common objectives and evaluation indicators for risk communication activities from 2011 to 2017

Presenter : Sato A., Honda K., Ono K., Kanda R., Hayashi T., Takeda Y., Takebayashi Y., Koboyashi T., Murakami M.
Title : , PeerJ (2020)
Adding value to ecological risk assessment with population modeling

Presenter : Forbes V.E., Calow P., Grimm V., Hayashi T.I., Jager T., Katholm A., Palmqvist A., Pastrok R., Salvito D., Sibly R., Spromberg J., Stark J., Stillman R.A.
Title : , Human and Ecological Risk Assessment, 17(2):287-299 (2011)

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Strategy for development of quantitative structure-activity-activity relationship models for chronic fish toxicity: prediction of early-life stage toxicity to Oryzias latipes from acute Daphnia magna toxicity

Presenter : Furuhama A., Hayashi T. I., Yamamoto H.
Title : , Japan Journal of Environmental Toxicology, 24:33-42 (2021)
Chlorantraniliprole application differentially affects adult emergence of Sympetrum dragonflies in rice paddy fields.

Presenter : Nakanishi K., Usio N., Yokomizo H., Takashima T., Hayashi T.
Title : , Paddy and Water Environment (2021)
Multivariate Analysis of Water Quality and Ecotoxicity to Aquatic Species in the Yoshino River and the Yodo River Basin, Japan

Presenter : Tamura I., Hayashi T., Nishi-ie S., Enyama M., Mitsuyama M., Tatarazako N., Yamamoto H.
Title : , 学会誌「EICA」, 23(2,3):75-85 (2018)
Need for Systematic Statistical Tools for Decision-Making in Radioactively Contaminated Areas

Presenter : Matsuzaki S., Kumagai N., Hayashi T.
Title : , Environmental Science Technology, 50:1075-1076 (2016)
Examining the relationship between chemical concentration and equilibrium population size

Presenter : Hayashi T.I., Kamo M, Tanaka Y.
Title : , Australas.J.Ecotoxicol., 14:31-35 (2009)
Concerns about reproducibility, use of the Akaike information criterion, and related issues in Hoondert et al. 2019

Presenter : Iwasaki Y., Hayashi T.
Title : , Environmental Toxicology and Chemistry, 39(7):1300-1301 (2020)
Integrating population modeling into ecological risk assessment

Presenter : Forbes V.E., Calow P., Grimm V, Hayashi T., Jager T., Palmqvist A., Pastrok R., Salvito D., Sibly R., Spromberg J., Stark J., Stillman R.A.
Title : , Integr.Environ.Assess.Manag., 6(1):191-193 (2010)

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Research Result (Presentation)

all
Research Presentation
Research Lecture

Research Presentation
How do the propensities to care about future generations associate with the perceptions of climate change?

Presenter : Hayashi T.
Name of Society : EcoDesign 2025 (2025)
Name of Proceedings : Proceedings paper, B-4-02
Research Presentation
Application of AmpliSeq to environmental RNA may enable non-invasive assessments of various activities in fish

Presenter : Hiki K., Hayashi T., Yamamoto H.
Name of Society : 21st International Symposium on Toxicity Assessment (2024)
Name of Proceedings : Abstracts, 56
Research Presentation
Exploring the causal relationship between insecticide use and sharp population declines of the dragonfly Sympetrum frequens in Japan

Presenter : Nakanishi K., Yokomizo H., Hayashi T.
Name of Society : XXVII International Congress of Entomology (ICE2024) (2024)
Name of Proceedings : Abstracts
Research Presentation
Assessing Impacts of Climate Change on Mercury Dynamics and Human Exposure Using a Global Model

Presenter : Kawai T., Takeuchi A., Hayashi T.
Name of Society : The 15th International Conference on Mercury as a Global Pollutant (ICMGP) (2022)
Name of Proceedings : Abstracts
Research Presentation
ASSESSING HUMAN EXPOSURE TO METHYLMERCURY FROM SEAFOOD CONSUMPTION USING A GLOBAL MODEL

Presenter : Kawai T., Hayashi T.
Name of Society : 2022 Ocean Sciences Meeting (2022)
Name of Proceedings : -
Research Lecture
Population model analyses of the combined effects of insecticide use and habitat degradation on the past sharp declines of the dragonfly Sympetrum frequens

Presenter : Hayashi T., Nakanishi K., Yokomizo H.
Name of Society : K-INET International Symposium 2022 (2022)
Name of Proceedings : Abstracts, 33
Research Presentation
A national-scale assessment of associations between benthic macroinvertebrate communities and nickel concentrations in Japan

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Name of Society : 第68回日本生態学会大会 (2021)
Name of Proceedings : Abstracts
Research Presentation
Developing a Species Sensitivity Distribution for Nano- and Microplastic Particles by Using Bayesian Hierarchical Modeling

Presenter : Takeshita K., Iwasaki Y., Sinclair T. M., Hayashi T., Naito W.
Name of Society : SETAC North America 42nd Annual Meeting (2021)
Name of Proceedings : Abstract
Research Presentation
Multimedia environmental fate of volatile methylsiloxanes modeled in the Tokyo Bay catchment basin

Presenter : Imaizumi Y., Sakurai T., Kuroda K., Hayashi T., Suzuki N.
Name of Society : SETAC Europe 30th Annual Meeting (2020)
Name of Proceedings : SETAC Europe 30th Annual Meeting Abstract Book, 226
Research Presentation
Do neonicotinoids associate with functional diversity of benthic macroinvertebrates?: Analyses of broad-scale biomonitoring and exposure datasets

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Name of Society : 日本生態学会第67回全国大会 (2020)
Name of Proceedings : Abstracts
Research Presentation
Associations between neonicotinoid insecticides and functional-feeding-group abundances of benthic invertebrate communities in rivers in urban rice-paddy areas

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Name of Society : 環境DNA学会第3回大会第36回個体群生態学会大会合同大会 (2020)
Name of Proceedings : Abstracts
Research Lecture
Negative effects of insecticides on the population dynamics of the dragonfly Sympetrum frequens in rice fields: A statistical analysis using field census data in Hokuriku region, Japan

Presenter : Nakanishi K., Uéda T., Yokomizo H., Hayashi T.
Name of Society : Joint International Symposium: Challenging the Research Development and Collaboration Through Online Discussion (2020)
Name of Proceedings : Abstracts
Research Presentation
Estimation of Effects of Intervention in Heavy Metal Concentrations on Aquatic Insects in the Field

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Name of Society : 5th NIES International Forum (2020)
Name of Proceedings : Abstracts, 67
Research Presentation
Models for predicting fish early-life stage toxicity of general industrial chemicals

Presenter : Furuhama A., Hayashi T., Yamamoto H.
Name of Society : Computational Methods in Toxicology and Pharmacology Integrating Internet Resources (CMTPI-2019) (2019)
Name of Proceedings : Abstracts, 18
Research Presentation
Making robust decisions in the face of uncertainty in ecological risk management of zinc in Japanese surface waters

Presenter : Yokomizo H., Naito W., Tanaka Y., Hayashi T., Kamo M.
Name of Society : SETAC Europe 29th Annual Meeting (2019)
Name of Proceedings : Abstracts, 328
Research Presentation
Causal inference in ecological risk assessment of heavy metals for benthic invertebrate community in rivers

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Name of Society : SETAC Europe 29th Annual Meeting (2019)
Name of Proceedings : Abstracts, 289
Research Presentation
The (mis) assessment of ecological risk for nickel based on the conventional statistical approach in ecotoxicology: the importance of causal inference

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Name of Society : 日本生態学会第66回全国大会 (2019)
Name of Proceedings : Abstracts
Research Presentation
Fish early-life stage toxicity predicted from acute Daphnia magna toxicity and molecular descriptors

Presenter : Furuhama A., Hayashi T., Yamamoto H.
Name of Society : 18th International Conference on QSAR in Environmental and Health Sciences (QSAR2018) (2018)
Name of Proceedings : Abstracts, 52
Research Presentation
Development of chronic aquatic toxicity models based on an interspecies relationship and molecular descriptors

Presenter : Furuhama A., Hayashi T., Yamamoto H., Tatarazako N.
Name of Society : CMTPI-2017 9th International Symposium on Computational Methods in Toxicology and Pharmacology Integrating Internet Resources (2017)
Name of Proceedings : Abstracts, 26
Research Presentation
Log D-based criterion: Strategies for developing aquatic toxicity prediction models

Presenter : Furuhama A., Hasunuma K., Hayashi T., Tatarazako N.
Name of Society : 17th International Conference on QSAR in Environmental and Health Sciences (2016)
Name of Proceedings : Abstracts, 53
Research Presentation
Three-step strategy for developing algal toxicity prediction models

Presenter : Furuhama A., Hasunuma K., Hayashi T., Tatarazako N.
Name of Society : The 43rd Symposium on Structural Activity Relationship 2015 & The 10th Japan-China Joint Symposium on Drug Discovery and Development(第43回構造活性相関シンポジウム第10回薬物の分子設計と開発に関する日中シンポジウム) (2015)
Name of Proceedings : Abstract, 31-34
Research Presentation
Ecological risk assessment of neonicotinoids and other systemic pesticides on paddy field in Japan: a 3-year project

Presenter : Hayashi T., Kasai A., Hisamatsu S., Boulangé J., Watanabe H., Hidaka K., Goka K.
Name of Society : Society of Environmental Toxicology and Chemistry North America 35th Annual Meeting (2014)
Name of Proceedings : Abstract Book of SETAC North America 35th Annual Meeting, 392
Research Presentation
ISSUES OF VARIABILITIES THAT MAY NEED TO BE CONSIDERED FOR APPLICABILITY OF PLANETARY BOUNDARY CONCEPT FOR CHEMICAL POLLUTION

Presenter : Suzuki N., Kawai T. , Imaizumi Y., Sakurai T., Hayashi T.
Name of Society : Dioxin 2012 Symposium (2012)
Name of Proceedings : Abstracts
Research Presentation
Exposure and ecological risk assessment of herbicides in Japan: risk calculation approaches focusing on space-and time varying herbicide exposure

Presenter : Hayashi T., Imaizumi Y., Tatarazako N., Suzuki N.
Name of Society : 22th SETAC Eueope Annual Meeting/6th SETAC Europe Special Science Symposium (2012)
Name of Proceedings : Abstracts of 22th SETAC Eueope Annual Meeting/6th SETAC Europe Special Science Symposium, 217
Research Presentation
A Bayesian approach to probabilistic ecological risk assessment using SSDs: Risk comparison of nine toxic substances in Tokyo surface waters

Presenter : Hayashi T., Kashiwagi N.
Name of Society : SETAC Europe 21st Annual Meeting (2011)
Name of Proceedings : SETAC Europe 21st Annual Meeting Abstract Book, 93
Research Presentation
Development of ecological risk assessment methods for space- and time-varying herbicide exposure

Presenter : Hayashi T., Imaizumi Y., Tatarazako N., Suzuki N.
Name of Society : SETAC Europe 21st Annual Meeting (2011)
Name of Proceedings : SETAC Europe 21st Annual Meeting Abstract Book, 270
Research Presentation
A bayesian approach to probabilistic ecological risk assessment

Presenter : Hayashi T., Kashiwagi N.
Name of Society : Jt.Symp.Young Sci.Ehime Univ.NIES (2010)
Name of Proceedings : Abstracts, 8
Research Presentation
A bayesian approach to probabilistic ecological risk assessment: Risk comparison of nine toxic substances in Tokyo surface waters

Presenter : Hayashi T.I., Kashiwagi N.
Name of Society : SETAC North Am.30th Annu.Meet. (2009)
Name of Proceedings : Abstracts, 236

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How do the propensities to care about future generations associate with the perceptions of climate change?

Presenter : Hayashi T.
Name of Society : EcoDesign 2025 (2025)
Name of Proceedings : Proceedings paper, B-4-02
Application of AmpliSeq to environmental RNA may enable non-invasive assessments of various activities in fish

Presenter : Hiki K., Hayashi T., Yamamoto H.
Name of Society : 21st International Symposium on Toxicity Assessment (2024)
Name of Proceedings : Abstracts, 56
A national-scale assessment of associations between benthic macroinvertebrate communities and nickel concentrations in Japan

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Name of Society : 第68回日本生態学会大会 (2021)
Name of Proceedings : Abstracts
Developing a Species Sensitivity Distribution for Nano- and Microplastic Particles by Using Bayesian Hierarchical Modeling

Presenter : Takeshita K., Iwasaki Y., Sinclair T. M., Hayashi T., Naito W.
Name of Society : SETAC North America 42nd Annual Meeting (2021)
Name of Proceedings : Abstract
Do neonicotinoids associate with functional diversity of benthic macroinvertebrates?: Analyses of broad-scale biomonitoring and exposure datasets

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Name of Society : 日本生態学会第67回全国大会 (2020)
Name of Proceedings : Abstracts
Models for predicting fish early-life stage toxicity of general industrial chemicals

Presenter : Furuhama A., Hayashi T., Yamamoto H.
Name of Society : Computational Methods in Toxicology and Pharmacology Integrating Internet Resources (CMTPI-2019) (2019)
Name of Proceedings : Abstracts, 18
The (mis) assessment of ecological risk for nickel based on the conventional statistical approach in ecotoxicology: the importance of causal inference

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Name of Society : 日本生態学会第66回全国大会 (2019)
Name of Proceedings : Abstracts
Fish early-life stage toxicity predicted from acute Daphnia magna toxicity and molecular descriptors

Presenter : Furuhama A., Hayashi T., Yamamoto H.
Name of Society : 18th International Conference on QSAR in Environmental and Health Sciences (QSAR2018) (2018)
Name of Proceedings : Abstracts, 52
Development of chronic aquatic toxicity models based on an interspecies relationship and molecular descriptors

Presenter : Furuhama A., Hayashi T., Yamamoto H., Tatarazako N.
Name of Society : CMTPI-2017 9th International Symposium on Computational Methods in Toxicology and Pharmacology Integrating Internet Resources (2017)
Name of Proceedings : Abstracts, 26
Log D-based criterion: Strategies for developing aquatic toxicity prediction models

Presenter : Furuhama A., Hasunuma K., Hayashi T., Tatarazako N.
Name of Society : 17th International Conference on QSAR in Environmental and Health Sciences (2016)
Name of Proceedings : Abstracts, 53
Three-step strategy for developing algal toxicity prediction models

Presenter : Furuhama A., Hasunuma K., Hayashi T., Tatarazako N.
Name of Society : The 43rd Symposium on Structural Activity Relationship 2015 & The 10th Japan-China Joint Symposium on Drug Discovery and Development(第43回構造活性相関シンポジウム第10回薬物の分子設計と開発に関する日中シンポジウム) (2015)
Name of Proceedings : Abstract, 31-34
ISSUES OF VARIABILITIES THAT MAY NEED TO BE CONSIDERED FOR APPLICABILITY OF PLANETARY BOUNDARY CONCEPT FOR CHEMICAL POLLUTION

Presenter : Suzuki N., Kawai T. , Imaizumi Y., Sakurai T., Hayashi T.
Name of Society : Dioxin 2012 Symposium (2012)
Name of Proceedings : Abstracts
A Bayesian approach to probabilistic ecological risk assessment using SSDs: Risk comparison of nine toxic substances in Tokyo surface waters

Presenter : Hayashi T., Kashiwagi N.
Name of Society : SETAC Europe 21st Annual Meeting (2011)
Name of Proceedings : SETAC Europe 21st Annual Meeting Abstract Book, 93
A bayesian approach to probabilistic ecological risk assessment

Presenter : Hayashi T., Kashiwagi N.
Name of Society : Jt.Symp.Young Sci.Ehime Univ.NIES (2010)
Name of Proceedings : Abstracts, 8
Exploring the causal relationship between insecticide use and sharp population declines of the dragonfly Sympetrum frequens in Japan

Presenter : Nakanishi K., Yokomizo H., Hayashi T.
Name of Society : XXVII International Congress of Entomology (ICE2024) (2024)
Name of Proceedings : Abstracts
Assessing Impacts of Climate Change on Mercury Dynamics and Human Exposure Using a Global Model

Presenter : Kawai T., Takeuchi A., Hayashi T.
Name of Society : The 15th International Conference on Mercury as a Global Pollutant (ICMGP) (2022)
Name of Proceedings : Abstracts
ASSESSING HUMAN EXPOSURE TO METHYLMERCURY FROM SEAFOOD CONSUMPTION USING A GLOBAL MODEL

Presenter : Kawai T., Hayashi T.
Name of Society : 2022 Ocean Sciences Meeting (2022)
Name of Proceedings : -
Multimedia environmental fate of volatile methylsiloxanes modeled in the Tokyo Bay catchment basin

Presenter : Imaizumi Y., Sakurai T., Kuroda K., Hayashi T., Suzuki N.
Name of Society : SETAC Europe 30th Annual Meeting (2020)
Name of Proceedings : SETAC Europe 30th Annual Meeting Abstract Book, 226
Associations between neonicotinoid insecticides and functional-feeding-group abundances of benthic invertebrate communities in rivers in urban rice-paddy areas

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Name of Society : 環境DNA学会第3回大会第36回個体群生態学会大会合同大会 (2020)
Name of Proceedings : Abstracts
Estimation of Effects of Intervention in Heavy Metal Concentrations on Aquatic Insects in the Field

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Name of Society : 5th NIES International Forum (2020)
Name of Proceedings : Abstracts, 67
Making robust decisions in the face of uncertainty in ecological risk management of zinc in Japanese surface waters

Presenter : Yokomizo H., Naito W., Tanaka Y., Hayashi T., Kamo M.
Name of Society : SETAC Europe 29th Annual Meeting (2019)
Name of Proceedings : Abstracts, 328
Causal inference in ecological risk assessment of heavy metals for benthic invertebrate community in rivers

Presenter : Takeshita K., Hayashi T., Yokomizo H.
Name of Society : SETAC Europe 29th Annual Meeting (2019)
Name of Proceedings : Abstracts, 289
Ecological risk assessment of neonicotinoids and other systemic pesticides on paddy field in Japan: a 3-year project

Presenter : Hayashi T., Kasai A., Hisamatsu S., Boulangé J., Watanabe H., Hidaka K., Goka K.
Name of Society : Society of Environmental Toxicology and Chemistry North America 35th Annual Meeting (2014)
Name of Proceedings : Abstract Book of SETAC North America 35th Annual Meeting, 392
Exposure and ecological risk assessment of herbicides in Japan: risk calculation approaches focusing on space-and time varying herbicide exposure

Presenter : Hayashi T., Imaizumi Y., Tatarazako N., Suzuki N.
Name of Society : 22th SETAC Eueope Annual Meeting/6th SETAC Europe Special Science Symposium (2012)
Name of Proceedings : Abstracts of 22th SETAC Eueope Annual Meeting/6th SETAC Europe Special Science Symposium, 217
Development of ecological risk assessment methods for space- and time-varying herbicide exposure

Presenter : Hayashi T., Imaizumi Y., Tatarazako N., Suzuki N.
Name of Society : SETAC Europe 21st Annual Meeting (2011)
Name of Proceedings : SETAC Europe 21st Annual Meeting Abstract Book, 270
A bayesian approach to probabilistic ecological risk assessment: Risk comparison of nine toxic substances in Tokyo surface waters

Presenter : Hayashi T.I., Kashiwagi N.
Name of Society : SETAC North Am.30th Annu.Meet. (2009)
Name of Proceedings : Abstracts, 236

View all

Population model analyses of the combined effects of insecticide use and habitat degradation on the past sharp declines of the dragonfly Sympetrum frequens

Presenter : Hayashi T., Nakanishi K., Yokomizo H.
Name of Society : K-INET International Symposium 2022 (2022)
Name of Proceedings : Abstracts, 33
Negative effects of insecticides on the population dynamics of the dragonfly Sympetrum frequens in rice fields: A statistical analysis using field census data in Hokuriku region, Japan

Presenter : Nakanishi K., Uéda T., Yokomizo H., Hayashi T.
Name of Society : Joint International Symposium: Challenging the Research Development and Collaboration Through Online Discussion (2020)
Name of Proceedings : Abstracts

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HAYASHI Takehiko

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