Latest Update：2026/03/24 10:39:25

KOSHIKAWA Hiroshi

Researcher Name: KOSHIKAWA Hiroshi

Div (Section) name/title: Regional Environment Conservation Division（Marine Environment Section）／Head

Research Subject: Impact of the Changjiang Diluted Water on plankton ecosystem on the central continental shelf of the East China Sea

Degree(s): Doctor of Engineering

Professional Qualification(s): Science,Engineering,Biology

Environmental Speciality Field: marine pollution,eutrophication,harmful algal bloom

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
- 27247 : Regional Environment Conservation Domain: Foresight and Advanced Basic Research
- 27326 : Development and implementation of the estuarine and coastal ecosystem digital twin
- 27329 : Observational platform construction for understanding of warming impact to oceanographic structure and ecosystem in the Japan Sea
- 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
- 27419 : Developing a water quality health assessment system for offshore exploitation sites
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
- 26864 : Regional Environment Conservation Domain: Foresight and Advanced Basic Research
- 26913 : Development of assessment method for nutrient management in specific sea areas
- 26915 : Development and implementation of the estuarine and coastal ecosystem digital twin
- 26945 : Developing a water quality health assessment system for offshore exploitation sites
- 27050 : Observational platform construction for understanding of warming impact to oceanographic structure and ecosystem in the Japan Sea
- 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
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
- 26453 : Regional Environment Conservation Domain: Foresight and Advanced Basic Research
- 26723 : Development of assessment method for nutrient management in specific sea areas
- 26725 : Developing a water quality health assessment system for offshore exploitation sites
- 26726 : Observational platform construction for understanding of warming impact to oceanographic structure and ecosystem in the Japan Sea
- 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
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
- 26010 : Regional Environment Conservation Domain: Foresight and Advanced Basic Research
- 26030 : Development of assessment method for nutrient management in specific sea areas
- 26261 : Observational platform construction for understanding of warming impact to oceanographic structure and ecosystem in the Japan Sea
- 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
- 26345 : Development of monitoring method by imaging analysis of meiofauna in deep-sea sediments
- 26377 : Prediction of climate change impacts on enclosed coastal sea environments
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
- 25613 : Prediction of Climate Change Impacts on Enclosed Coastal Sea Environment and Adaptations
- 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
- 25713 : Regional Environment Conservation Domain: Foresight and Advanced Basic Research
- 25735 : Observational platform construction for understanding of warming impact to oceanographic structure and ecosystem in the Japan Sea
- 25927 : Study on practical assessment technique for marine environment during seafloor mineral mining
- 25928 : Development of monitoring method by imaging analysis of meiofauna in deep-sea sediments
Fiscal Year: 2020
- 25127 : Center for Climate Change Adaptation (CCCA)
- 25359 : Study on practical assessment technique for marine environment during seafloor mineral mining
- 25368 : Development of monitoring method by imaging analysis of meiofauna in deep-sea sediments
- 25432 : Research into Observation, Monitoring and Detection of Climate Change and Resultant Impacts
- 25439 : Prediction of Climate Change Impacts on Enclosed Coastal Sea Environment and Adaptations
Fiscal Year: 2019
- 24757 : Center for Climate Change Adaptation (CCCA)
- 25052 : Study on practical assessment technique for marine environment during seafloor mineral mining
- 25056 : Research into Observation, Monitoring and Detection of Climate Change and Resultant Impacts
- 25075 : Prediction of Climate Change Impacts on Enclosed Coastal Sea Environment and Adaptations
Fiscal Year: 2018
- 24340 : Climate Change Strategy Collaboration Office
- 24514 : Global warming impacts on thermohaline circulation and subsequent biogeochemical change in the Japan Sea
- 24543 : Assessment of impact of climate change on the environment of an enclosed sea in Japan
Fiscal Year: 2017
- 23861 : Climate Change Strategy Collaboration Office
- 24052 : Assessment of impact of climate change on the environment of an enclosed sea in Japan
- 24053 : Global warming impacts on thermohaline circulation and subsequent biogeochemical change in the Japan Sea
- 24066 : Research and Development of Monitoring and Forecasting Systems for Marine Ecosystem Management
Fiscal Year: 2016
- 23606 : Global warming impacts on thermohaline circulation and subsequent biogeochemical change in the Japan Sea
- 23683 : Research and Development of Monitoring and Forecasting Systems for Marine Ecosystem Management
- 23771 : Assessment of impact of climate change on the environment of an enclosed sea in Japan
Fiscal Year: 2015
- 23005 : Analyses of the impact of the anthropogenic pollution on the ecosystem of the East China Sea and the sea around Japan
- 23262 : Research and Development of Monitoring and Forecasting Systems for Marine Ecosystem Management
Fiscal Year: 2014
- 22593 : Analyses of the impact of the anthropogenic pollution on the ecosystem of the East China Sea and the sea around Japan
- 22938 : Research and Development of Monitoring and Forecasting Systems for Marine Ecosystem Management
Fiscal Year: 2013
- 22177 : Analyses of the impact of the anthropogenic pollution on the ecosystem of the East China Sea and the sea around Japan
Fiscal Year: 2012
- 21748 : Analyses of the impact of the anthropogenic pollution on the ecosystem of the East China Sea and the sea around Japan
- 21813 : Deterioration of sedimentary environment and assessment of its impacton benthic fauna in coastal sea close to urbanized area
Fiscal Year: 2011
- 21306 : Analyses of the impact of the anthropogenic pollution on the ecosystem of the East China Sea and the sea around Japan
- 21355 : Deterioration of sedimentary environment and assessment of its impacton benthic fauna in coastal sea close to urbanized area
- 21712 : Development of the systems for evaluating regional water and material cycles in East Asia
Fiscal Year: 2010
- 21163 : Development of the systems for evaluating regional water and material cycles in East Asia
- 21211 : Watershed environment management based on the coexistence with nature in Ise Bay
- 21212 : Development of integrated environmental management for Changjiang River basin to conserve the sound environmental conditions in East China Sea
- 21250 : Deterioration of sedimentary environment and assessment of its impacton benthic fauna in coastal sea close to urbanized area
Fiscal Year: 2009
- 20599 : Development of the systems for evaluating regional water and material cycles in East Asia
- 20653 : Hypoxia generation and its impact on benthic biota
- 20682 : Development of integrated environmental management for Changjiang River basin to conserve the sound environmental conditions in East China Sea
- 20783 : Watershed environment management based on the coexistence with nature in Ise Bay
Fiscal Year: 2008
- 20231 : Development of the systems for evaluating regional water and material cycles in East Asia
- 20336 : Watershed environment management based on the coexistence with nature in Ise Bay
- 20347 : Hypoxia generation and its impact on benthic biota
- 20392 : Examination on Environmental Quality Standards for Conservation of the Living Environment in F.Y. 2008 (field observation and mechanism study)
Fiscal Year: 2007
- 10547 : Watershed environment management based on the coexistence with nature in Ise Bay
- 10587 : Development of the systems for evaluating regional water and material cycles in East Asia
Fiscal Year: 2006
- 10051 : Evaluation and restoration of lake environment based on linkages among the bioreactivity and chemical composition of organic matter
- 10286 : Watershed environment management based on the coexistence with nature in Ise Bay
- 10320 : Development of the systems for evaluating regional water and material cycles in East Asia
Fiscal Year: 2005
- 9352 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia(3) Dynamics and ecological assessment of environmental pollution due to the Changjiang discharge in East China Sea
- 9353 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia(4) Studies on the environmental management in coastal zones
- 9395 : Material cycles by benthic ecosystem in coastal areas
- 9522 : Evaluation and restoration of lake environment based on linkages among the bioreactivity and chemical composition of organic matter
Fiscal Year: 2004
- 8956 : Studies on evaluation method for natural attenuation process in submerged ecosystem
- 8988 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia(3) Dynamics and ecological assessment of environmental pollution due to the Changjiang discharge in East China Sea
- 8989 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia(4) Studies on the environmental management in coastal zones
- 9029 : Material cycles by benthic ecosystem in coastal areas
- 9062 : Element cycle response to the dynamic change of environmental loads from land in the East China Sea
- 9273 : Evaluation and restoration of lake environment based on linkages among the bioreactivity and chemical composition of organic matter
Fiscal Year: 2003
- 8633 : Studies on evaluation method for natural attenuation process in submerged ecosystem
- 8705 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia(3) Dynamics and ecological assessment of environmental pollution due to the Changjiang discharge in East China Sea
- 8706 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia(4) Studies on the environmental management in coastal zones
- 8747 : Material cycles by benthic ecosystem in coastal areas
- 8792 : Element cycle response to the dynamic change of environmental loads from land in the East China Sea
Fiscal Year: 2002
- 8326 : Bioremediation for spilled oil and its risk assessment for marine ecosystem
- 8397 : Studies on evaluation method for natural attenuation process in submerged ecosystem
- 8400 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia (3) Dynamics and ecological assessment of environmental pollution due to the Changjiang discharge in East China Sea
- 8401 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia (4) Studies on the environmental management in coastal zones
- 8529 : Material cycles by benthic ecosystem in coastal areas
- 8588 : Element cycle response to the dynamic change of environmental loads from land in the East China Sea
Fiscal Year: 2001
- 8030 : Study on effect of eutrophication on the growth of toxic algae and the　metabolism of climate impact gas in aquatic ecosystems
- 8033 : Bioremediation for spilled oil and its risk assessment for marine　ecosystem
- 8051 : D-1 Research on dynamics of environmental pollution through the Changjiang River and its effect on marine ecosystem in EastChina Sea.
- 8150 : Studies on evaluation method for natural attenuation process in submerged ecosystem
- 8153 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia (3) Dynamics and ecological assessment of environmental pollution due to the Changjiang discharge in East China Sea.
- 8154 : Research project on integrated environmental management aided by modelling of eco-system functions through the basin in East Asia (4) Studies on the environmental management in coastal zones
- 8292 : Material cycles by benthic ecosystem in coastal areas

View all

Research Result (Publication)

Book

Assessment of Possible Environmental Impacts Using Flow-Cytometric Analysis of Metal Toxicity in Marine Phytoplankton

Presenter : Ota S., Koshikawa H., Kawachi M.
Title : , Deep-Sea Mining and the Water Column (2024)
Original Paper

Propidium iodide staining and flow cytometry-based assessment of heavy metal impact on marine phytoplankton

Presenter : Ota S., Fuchida S., Yamaguchi H., Yamagishi T., Yamamoto H., Koshikawa H., Kawachi M.
Title : , Cytologia, 87(2):177-187 (2022)
Original Paper

Kinetic investigation of galvanic dissolution of ZnS and PbS with FeS2 from hydrothermal sulfides in seawater

Presenter : Fuchida S., Kawachi M., Koshikawa H.
Title : , Applied Geochemistry, 129: (2021)
Original Paper

Differential heavy metal sensitivity in seven algal species from the NIES culture collection based on delayed fluorescence assays

Presenter : Ota S., Yamaguchi H., Vanel F., Fuchida S., Koshikawa H., Yamagishi T., Yamamoto H., Kawachi M.
Title : , Phycological Research, 68(1):41-49 (2020)
Book

Metal Mobility from Hydrothermal Sulfides into Seawater During Deep Seafloor Mining Operations

Presenter : Fuchida S., Ishibashi J., Nozaki T., Matsushita Y., Kawachi M., Koshikawa H.
Title : , Environmental Issues of Deep-Sea Mining: Impacts, Consequences and Policy Perspectives (2019)
Original Paper

Short-Term changes in marine prokaryotic and eukaryotic microalgal communities exposed to the leachate of a seafloor hydrothermal sulfide

Presenter : Tsuboi S., Yamaguchi H., Fuchida S., Koshikawa H., Kawachi M.
Title : , Water, Air, & Soil Pollution, 230(8):175 (2019)
Book

Ecotoxicological Bioassay Using Marine Algae for Deep-Sea Mining

Presenter : Yamagishi T., Ota S., Yamaguchi H., Koshikawa H., Tatarazako, N., Yamamoto H., Kawachi M.
Title : , Environmental Issues of Deep-Sea Mining: Impacts, Consequences and Policy Perspectives (2019)
Original Paper

Onboard experiment investigating metal leaching of fresh hydrothermal sulfide cores into seawater

Presenter : Fuchida S., Ishibashi J., Shimada K., Nozaki T., Kumagai H., Kawachi M., Matsushita Y., Koshikawa H.
Title : , Geochemical Transaction, 19(15): (2018)
Other Publications

Evaluation of the toxicity of leaches from hydrothermal sulfide deposits by means of a delayed fluorescence-based bioassay with the marine cyanobacterium Cyanobium sp. NIES-981

Presenter : Yamagishi T., Fuchida S., Katsumata M, Horie Y, Mori F., Kawachi M., Koshikawa H., Nozaki T., Kumagai H., Ishibasi J., Tatarazako N
Title : , Ecotoxycology (2018)
Original Paper

Leaching of metals and metalloids from hydrothermal ore particulates and their effects on marine phytoplankton

Presenter : Fuchida S., Yokoyama A., Fukuchi R., Ishibashi J., Kawagucci S., Kawachi M., Koshikawa H.
Title : , ACS Omega, 2(7):3175-3182 (2017)
Original Paper

Rapid ecotoxicological bioassay using delayed fluorescence in the marine cyanobacterium Cyanobium sp.(NIES-981)

Presenter : Yamagishi T., Katsumata M, Yamaguchi H., Shimura Y., Kawachi M., Koshikawa H., Horie Y., Tatarazako N.
Title : , Ecotoxicology, 25(10):1751-1758 (2016)
Original Paper

Assessing depth-integrated phytoplankton biomass in the East China Sea using a unique empirical protocol to estimate euphotic depth

Presenter : Koshikawa H., Higashi H., Hasegawa T., Nishiuch K., Sasaki H., Kawachi M., Kiyomoto Y., Takayanagi K., Kohata K., Murakami S.
Title : , Estuarine, Coastal and Shelf Science, 153:74-85 (2015)
Original Paper

Estimation of Vertical Eddy Diffusivity in a Shallow Floating Mesocosm

Presenter : Harada S., Koshikawa H., Adams E.E.
Title : , Journal of Marine Environmental Engineering, 9(4):275-283 (2014)
Original Paper

30-year changes in the nitrogen inputs to the Yangtze River Basin

Presenter : Wang Q-X., Koshikawa H., Liu C, Otsubo K.
Title : , Environ. Res. Lett., 9(115005):1-12 (2014)
Original Paper

Temporal changes in carbon and nitrogen stable isotope ratios of macrozoobenthos on an artificial tidal flat facing a hypertrophic canal, inner Tokyo Bay

Presenter : Kanaya G., Nakamura Y., Koizumi T., Yamada K., Koshikawa H., Kohzu A., Maki H.
Title : , Marine Pollution Bulletin, 71:179-189 (2013)
Original Paper

Succession of genetic diversity of Botryococcus braunii (Trebouxiophyceae) in two Japanese reservoirs

Presenter : Demura M., Kawachi M., Koshikawa H., Nakayama T., Mayuzumi Y., Watanabe M.M.
Title : , Procedia Environmental Sciences, 15:3-11 (2012)
Other Publications

Interannual variation of material flux under seasonal sea ice in the Okhotsk Sea north of Hokkaido, Japan

Presenter : Hiwatari T., Koshikawa H., Kohata K., Nagata R.
Title : , PICES Sci.Rep., 36:60-63 (2009)
Original Paper

Vertical material flux under seasonal sea ice in the Okhotsk Sea north of Hokkaido, Japan

Presenter : Hiwatari T., Shirasawa K., Fukamachi Y., Nagata R., Koizumi T., Koshikawa H., Kohata K.
Title : , Polar Sci., 2(1):41-54 (2008)
Effect of the water-soluble fraction of diesel oil on bacterial and primary production and the trophic transfer to mesozooplankton through a microbial food web in Yangtze estuary,China

Presenter : KAWACHI Masanobu, , , MAKI Hideaki, KOSHIKAWA Hiroshi
Title : , Estuar.,Coast.Shelf Sci., 71:68-80 (2007)
Other Publications

Sedimentation from seasonal sea ice: particle flux at an offshore of Mombetsu in the Okhotsk coast of Hokkaido, Japan

Presenter : Hiwatari T., Shirasawa K., Fukamachi Y., Nagata R., Koshikawa H., Kohata K.
Title : , Proc.21th Int.Symp.Okhotsk Sea & Sea Ice, 21:9-11 (2006)
Other Publications

Trophic structure on the marine food web in an nearshore zone on the Okhotsk coast on northern Hokkaido, Japan as traced by delta (13)C and delta (15)N

Presenter : Hiwatari T., Koshikawa H., Nagata R., Suda Y., Hamaoka S., Kohata K., Watanabe M.
Title : , Proc.20th Int.Symp.Okhotsk Sea & Sea Ice , 20:18-22 (2005)
Anomalous current recorded at lower low water off the Changjiang River mouth,China

Presenter : Wang Z.(*1), Chen Z.(*1), Okamura K.(*2), Gao J.(*3), Xu K-Q., Koshikawa H.
Title : , Geo-Mar.Lett., 24(4):252-258 (2004)
Bacterial distribution and phylogenetic diversity in the Changjiang estuary before the construction of the Three Gorges Dam

Presenter : , , KOSHIKAWA Hiroshi, Xu K-Q.
Title : , Microb.Ecol., 43:82-91 (2002)
Succession of microbial communities during a biostimulation process as evaluated by DGGE and clone library analyses

Presenter : KOSHIKAWA Hiroshi
Title : , J.Appl.Microbiol., 91:625-635 (2001)
Susceptibility of the hyalid amphipod hyale barbicornis to water-soluble-fractions of fuel oil and a bioremediation-amending agent,Inipol EAP22

Presenter : , MAKI Hideaki, KOSHIKAWA Hiroshi
Title : , Pol.Arch.Hydrobiol., 47(3/4):651-656 (2000)
Contribution of bacterial production to sinking Carbon Flux in a Japanese coastal area:A marine mesocosm study

Presenter : , KOSHIKAWA Hiroshi
Title : , J.Global Environ.Eng., 6:51‐64 (2000)
Effects of Environmental Pollution Load Through Large Rivers on Marine Ecosystem in the East China Sea

Presenter : , , KOSHIKAWA Hiroshi
Title : , Res.Relat.UNESCO's Man & Biosphere Programme Jpn., 15‐22 (2000)
Influence of plankton community structure on the contribution of bacterial production to metazooplankton in a coastal mesocosm

Presenter : , KOSHIKAWA Hiroshi
Title : , Mar.Ecol.Prog.Ser., 186:31‐42 (1999)
Analyses of planktonic ecosystem structure in coastal seas using a large-scale stratified mesocosm: a new approach to understanding the effects of physical,biochemical and ecological factors on phytoplankton species succession

Presenter : , , KOSHIKAWA Hiroshi
Title : , Water Sci.Technol., 34(7-8):219‐226 (1996)
Relative contribution of bacterial and photosynthetic production to metazooplankton as carbon sources

Presenter : KOSHIKAWA Hiroshi
Title : , J.Plankton Res., 18(12):2269‐2281 (1996)
Determination of bioconcentration potential of tetrachloroethylene in Marine Algae by 13C

Presenter : KOSHIKAWA Hiroshi
Title : , Chemosphere, 33(5):865‐877 (1996)
Modeling the bioconcentration of hydrophobic organic chemicals in aquatic organisms

Presenter : KOSHIKAWA Hiroshi
Title : , Chemosphere, 32(9):1783‐1793 (1996)

View all

Propidium iodide staining and flow cytometry-based assessment of heavy metal impact on marine phytoplankton

Presenter : Ota S., Fuchida S., Yamaguchi H., Yamagishi T., Yamamoto H., Koshikawa H., Kawachi M.
Title : , Cytologia, 87(2):177-187 (2022)
Kinetic investigation of galvanic dissolution of ZnS and PbS with FeS2 from hydrothermal sulfides in seawater

Presenter : Fuchida S., Kawachi M., Koshikawa H.
Title : , Applied Geochemistry, 129: (2021)
Differential heavy metal sensitivity in seven algal species from the NIES culture collection based on delayed fluorescence assays

Presenter : Ota S., Yamaguchi H., Vanel F., Fuchida S., Koshikawa H., Yamagishi T., Yamamoto H., Kawachi M.
Title : , Phycological Research, 68(1):41-49 (2020)
Short-Term changes in marine prokaryotic and eukaryotic microalgal communities exposed to the leachate of a seafloor hydrothermal sulfide

Presenter : Tsuboi S., Yamaguchi H., Fuchida S., Koshikawa H., Kawachi M.
Title : , Water, Air, & Soil Pollution, 230(8):175 (2019)
Onboard experiment investigating metal leaching of fresh hydrothermal sulfide cores into seawater

Presenter : Fuchida S., Ishibashi J., Shimada K., Nozaki T., Kumagai H., Kawachi M., Matsushita Y., Koshikawa H.
Title : , Geochemical Transaction, 19(15): (2018)
Leaching of metals and metalloids from hydrothermal ore particulates and their effects on marine phytoplankton

Presenter : Fuchida S., Yokoyama A., Fukuchi R., Ishibashi J., Kawagucci S., Kawachi M., Koshikawa H.
Title : , ACS Omega, 2(7):3175-3182 (2017)
Rapid ecotoxicological bioassay using delayed fluorescence in the marine cyanobacterium Cyanobium sp.(NIES-981)

Presenter : Yamagishi T., Katsumata M, Yamaguchi H., Shimura Y., Kawachi M., Koshikawa H., Horie Y., Tatarazako N.
Title : , Ecotoxicology, 25(10):1751-1758 (2016)
Assessing depth-integrated phytoplankton biomass in the East China Sea using a unique empirical protocol to estimate euphotic depth

Presenter : Koshikawa H., Higashi H., Hasegawa T., Nishiuch K., Sasaki H., Kawachi M., Kiyomoto Y., Takayanagi K., Kohata K., Murakami S.
Title : , Estuarine, Coastal and Shelf Science, 153:74-85 (2015)
Estimation of Vertical Eddy Diffusivity in a Shallow Floating Mesocosm

Presenter : Harada S., Koshikawa H., Adams E.E.
Title : , Journal of Marine Environmental Engineering, 9(4):275-283 (2014)
30-year changes in the nitrogen inputs to the Yangtze River Basin

Presenter : Wang Q-X., Koshikawa H., Liu C, Otsubo K.
Title : , Environ. Res. Lett., 9(115005):1-12 (2014)
Temporal changes in carbon and nitrogen stable isotope ratios of macrozoobenthos on an artificial tidal flat facing a hypertrophic canal, inner Tokyo Bay

Presenter : Kanaya G., Nakamura Y., Koizumi T., Yamada K., Koshikawa H., Kohzu A., Maki H.
Title : , Marine Pollution Bulletin, 71:179-189 (2013)
Succession of genetic diversity of Botryococcus braunii (Trebouxiophyceae) in two Japanese reservoirs

Presenter : Demura M., Kawachi M., Koshikawa H., Nakayama T., Mayuzumi Y., Watanabe M.M.
Title : , Procedia Environmental Sciences, 15:3-11 (2012)
Vertical material flux under seasonal sea ice in the Okhotsk Sea north of Hokkaido, Japan

Presenter : Hiwatari T., Shirasawa K., Fukamachi Y., Nagata R., Koizumi T., Koshikawa H., Kohata K.
Title : , Polar Sci., 2(1):41-54 (2008)

View all

Assessment of Possible Environmental Impacts Using Flow-Cytometric Analysis of Metal Toxicity in Marine Phytoplankton

Presenter : Ota S., Koshikawa H., Kawachi M.
Title : , Deep-Sea Mining and the Water Column (2024)
Metal Mobility from Hydrothermal Sulfides into Seawater During Deep Seafloor Mining Operations

Presenter : Fuchida S., Ishibashi J., Nozaki T., Matsushita Y., Kawachi M., Koshikawa H.
Title : , Environmental Issues of Deep-Sea Mining: Impacts, Consequences and Policy Perspectives (2019)
Ecotoxicological Bioassay Using Marine Algae for Deep-Sea Mining

Presenter : Yamagishi T., Ota S., Yamaguchi H., Koshikawa H., Tatarazako, N., Yamamoto H., Kawachi M.
Title : , Environmental Issues of Deep-Sea Mining: Impacts, Consequences and Policy Perspectives (2019)

View all

Sedimentation from seasonal sea ice: particle flux at an offshore of Mombetsu in the Okhotsk coast of Hokkaido, Japan

Presenter : Hiwatari T., Shirasawa K., Fukamachi Y., Nagata R., Koshikawa H., Kohata K.
Title : , Proc.21th Int.Symp.Okhotsk Sea & Sea Ice, 21:9-11 (2006)
Trophic structure on the marine food web in an nearshore zone on the Okhotsk coast on northern Hokkaido, Japan as traced by delta (13)C and delta (15)N

Presenter : Hiwatari T., Koshikawa H., Nagata R., Suda Y., Hamaoka S., Kohata K., Watanabe M.
Title : , Proc.20th Int.Symp.Okhotsk Sea & Sea Ice , 20:18-22 (2005)
Evaluation of the toxicity of leaches from hydrothermal sulfide deposits by means of a delayed fluorescence-based bioassay with the marine cyanobacterium Cyanobium sp. NIES-981

Presenter : Yamagishi T., Fuchida S., Katsumata M, Horie Y, Mori F., Kawachi M., Koshikawa H., Nozaki T., Kumagai H., Ishibasi J., Tatarazako N
Title : , Ecotoxycology (2018)
Interannual variation of material flux under seasonal sea ice in the Okhotsk Sea north of Hokkaido, Japan

Presenter : Hiwatari T., Koshikawa H., Kohata K., Nagata R.
Title : , PICES Sci.Rep., 36:60-63 (2009)

View all

Research Result (Presentation)

Research Presentation

A Numerical Model to Assess the Effects of Adaptive Nutrient Management on Coastal Environment and Biological Productivity

Presenter : Higashi H., Umehara A., Hamawaki R., Koshikawa H., Nishijima W.
Name of Society : The International Society for Ecological Modelling Global Conference 2025 (2025)
Name of Proceedings : abstracts
Enhancing Surface Seawater Monitoring during Deep-Sea Mining: Onboard Bioassay and Phyto-Alert Systems

Presenter : Koshikawa H., Ota S., Yamagishi T., Namba N,, Kawachi M.
Name of Society : The 9th Asian Pacific Phycological Forum (APPF 2020) (2024)
Name of Proceedings : The 9th Asian Pacific Phycological Forum (APPF 2020), 142
Research Presentation

Practice of Marine Environmental Impact Assessment and Monitoring Using Iso Standards

Presenter : Yamamoto H., Kawachi M., Iijima K., Kawagucci S., Miwa T., Inomata K., Kyo M., Koshikawa H., Tsutsumi K., Yoshida K.
Name of Society : 2023 IEEE Underwater Technology (2023)
Name of Proceedings : Abstracts, 37-41
Research Lecture

Phyto-Alert System for monitoring surface water quality and safety based on in situ phytoplankton health

Presenter : Koshikawa H.
Name of Society : SIP On-line Seminar 2022 (2022)
Name of Proceedings : -
Research Presentation

Evaluation of galvanic effects of sulfide mineras on metal dissolution from hydrotehrmal sulfides in seawater; implications for impact assessment of SMS-mining on marine environment

Presenter : Fuchida S., Koshikawa H., Kawachi M.
Name of Society : AGU Fall Meeting 2019 (2019)
Name of Proceedings : Abstracts
Research Presentation

Large-eddy simulation of tidal bottom boundary layer and behavior of suspended particulate matter on the Okinawa Trough, Japan

Presenter : Furuichi N., Higashi H., Koshikawa H., Furushima Y.
Name of Society : Japan Geoscience Union Meeting 2018 (2018)
Name of Proceedings : Abstracts, AOS11-16
Research Presentation

Oxidation and metal dissolution mechanisms of polymetallic sulfide complex in seawater; implications for impact assessment of SMS-mining

Presenter : Fuchida S., Shimada K., Ishibashi J., Matsushita Y., Kawachi M., Koshikawa H.
Name of Society : American Geophysical Union 2018 Fall Meeting (2018)
Name of Proceedings : -
Onboard Ecotoxicological Technique to Qualify the Surface Water Safety

Presenter : Koshikawa H.
Name of Society : Latest progress on development of Technical Standards for Use in Marine Environment Impact Assessment and the Potential Benefits for Capacity Building (Lunch Time Side Event of BBNJ PrepCom 4) (2017)
Name of Proceedings : -
Research Presentation

Onboard ecotoxicological technique to qualify the surface water safety during full-scale mining operation of SMS deposits

Presenter : Koshikawa H., Yamagishi T., Fuchida S., Tatarazako N., Kawachi M.
Name of Society : STAR2017, The Pacific Islands Science, Technology, and Resources Conference (2017)
Name of Proceedings : Abstracts, 23
Research Presentation

Evaluation of metal dissolution from fresh hydrothermal core samples collected at Izena Hole during CK16-05 and rapid detection of their toxicity on marine phytoplankton community; Environmental impact assessment for seafloor metal-mining

Presenter : Fuchida S., Yamagishi T., Koshikawa H., Kawachi M., Fukuhara T., Kumagai H., Nozaki T., Ishibashi J., Maeda L., CK16-05 shipboard scientists
Name of Society : Japan Geoscience Union Meeting 2017 (2017)
Name of Proceedings : Abstract
Research Lecture

Environmental pollution monitoring system using bioassay

Presenter : Koshikawa H., Kawachi M.
Name of Society : EcoDeep SIP Workshop II (2017)
Name of Proceedings : Abstracts, 20
Research Presentation

DEEP SEA MINING AND ITS POSSIBLE IMPACT ON SURFACE PHYTOPLANKTON AT HYDROTHERMAL FIELDS

Presenter : Koshikawa H., Fuchida S., Yokoyama A., Tsuboi S., Yamagishi T., Kawachi M.
Name of Society : ASLO 2017 Aquatic Sciences Meeting (2017)
Name of Proceedings : -
Research Presentation

Possible impact of seafloor mining on surface microbial diversity at Okinawa Trough

Presenter : Kawachi M., Yamaguchi H., Tsuboi S., Fuchida S., Yamagishi T., Koshikawa H.
Name of Society : ASLO 2017 Aquatic Sciences Meeting (2017)
Name of Proceedings : -
Research Presentation

Development of methods to assess the toxic effects of heavy metals on microalgae using a microbial viability test

Presenter : Ota S., Yamaguchi H., Yamagishi T., Tatarazako N., Fuchida S., Koshikawa H., Kawachi M.
Name of Society : 8th Asian Pacific Phycological Forum (APPF 2017) (2017)
Name of Proceedings : Abstracts, 153
Research Presentation

Periodic behaviors of deep-ocean flow and turbulent mixing in hydrothermal field on the Okinawa Trough, Japan

Presenter : Furushima Y., Furuichi N., Higashi H., Koshikawa H., Yamamoto H.
Name of Society : Oceans 2016 (2016)
Name of Proceedings : Proceedings of OCEANS 2016 MTS/IEEE Monterey Conference & Exhibition
Research Presentation

Industrial discharge of chemical oxygen demand in China and its reduction potential towards 2030

Presenter : Akiyama C., Higashi H., Dai H., Okadera T., Koshikawa H., Masui T.
Name of Society : 11th Conference on Sustainable Development of Energy, Water, and Environment Systems, SDEWES2016 (2016)
Name of Proceedings : Proceedings of the 11th Conference on Sustainable Development of Energy, Water, and Environment Systems, SDEWES2016., 1-8
Research Presentation

Arsenic contaminations and its effect on marine phytoplankton during seafloor mining

Presenter : Fuchida S., Koshikawa H., Tsuboi S., Furuichi N., Yamamoto H., Kawachi M.
Name of Society : Goldschmidt Conference 2016 (2016)
Name of Proceedings : Abstract
Research Presentation

Simulation of the Non-point Source of Nitrogen and Phosphorus Loads under Different Land Uses in the Yangtze River Basin, China

Presenter : Wang Q-X., Xiao Q., Koshikawa H.
Name of Society : 日本地球惑星科学連合2016年大会 (2016)
Name of Proceedings : Abstracts, 2016(HSC04-05)
Research Presentation

Risk of heavy metal and arsenic contaminations and its effect on marine phytoplankton during seafloor mining

Presenter : Fuchida S., Koshikawa H., Tsuboi S., Furuichi N., Yamamoto H., Kawachi M.
Name of Society : japan Geoscience Union Meeting 2016 (2016)
Name of Proceedings : Abstract
Research Presentation

A large-eddy simulation study of the tidal bottom boundary layer and the behavior of suspended particulate matter on the Okinawa Trough, Japan

Presenter : Furuichi N., Higashi H., Koshikawa H., Furushima Y.
Name of Society : 2016 Ocean Sciences Meeting (2016)
Name of Proceedings : Abstracts, (PO24A-2928)
Research Presentation

Possible impacts of seafloor mining on phytoplankton communities at hydrothermal fields

Presenter : Koshikawa H., Fuchida S., Tsuboi S., Yamagishi T., Yokoyama A., Kawachi M.
Name of Society : ACO2016, A connected ocean & EuroGOOS joint workshop program (2016)
Name of Proceedings : -
Research Lecture

A Study on Nitrogen and Phosphorus Pollution and its Reduction Strategies in the Yangtze River Basin

Presenter : Wang Q-X., Xiao Q., Koshikawa H., Higashi H., Liu C., Wang K-L., Song X-F., Ye M.
Name of Society : Pollution Process and Control of Nitrogen and Phosphorus in River Basin (2015)
Name of Proceedings : -
Research Lecture

Prediction of Nitrogen and Phosphorus Pollutant Loads from the Yangtze River Basin

Presenter : Wang Q-X., Xiao Q., Koshikawa H., Higashi H., Liu C., Wang K-L., Song X-F., Ye M.
Name of Society : The 3rd International Symposium on Sustainable Agriculture for Subtropical Regions (ISSASR-3 2015) (2015)
Name of Proceedings : -
Research Presentation

Observations of turbulence in the summer East China Sea

Presenter : Furuichi N., Higashi H., Koshikawa H., Hasegawa T., Nishiuchi K, Yamada H
Name of Society : PICES 2014 Annual Meeting (2014)
Name of Proceedings : Abstracts, 171-171
Research Presentation

A Numerical Study on Relationships between Climate Change and Short-Necked Clam (Ruditapes philippinarum) Biomass in 1990s in Ise Bay, Japan

Presenter : Higashi H., Hanamachi Y., Koshikawa H., Murakami S., Kohata K.
Name of Society : 9th International Symposium on Ecohydraulics (2012)
Name of Proceedings : Abstracts
Research Presentation

A Numerical Study on Predominance of Dinoflagellates on the Central Continental Shelf of the East China Sea

Presenter : Higashi H., Koshikawa H., Wang Q-X., Mizuochi M., Hasegawa T., Kiyomoto Y., Nishiuchi K., Okamura K., Sasaki H., Gomi Y., Akiyama H., Kohata K., Murakami S.
Name of Society : PICES 2012 Annual Meeting (2012)
Name of Proceedings : Abstracts, 208
Research Presentation

Effects of land-based pollution control on coastal hypoxia: a numerical case study of integrated coastal area and river basin management in Ise Bay, Japan

Presenter : Higashi H., Koshikawa H., Murakami S., Kohata K., Mizuochi M., Tsujimoto T.
Name of Society : The 18th Biennial Conference of International Society for Ecological Modelling (2011)
Name of Proceedings : Procedia Environmental Sciences, 13:232-241
Research Presentation

A numerical study of climate change impacts on growth and population dynamics of the short-necked clam ruditapes philippinarum in Ise Bay, Japan

Presenter : Higashi H., Hanamachi Y., Koshikawa H., Murakami S., Kohata K., Mizuochi M.
Name of Society : 8th Int.Symp.Ecohydraulics 2010 (2010)
Name of Proceedings : Proceedings, 1820-1827
Research Presentation

Relationship between water quality trend and climate change in Ise Bay, Japan

Presenter : Higashi H., Koshikawa H., Kohata K., Murakami S., Mizuochi M.
Name of Society : PICES 2009 Annu.Meet. (2009)
Name of Proceedings : Abstracts, 209
Research Presentation

Dominance of the dinoflagellate Prorocentrum dentatum on the central continental shelf of the East China Sea in early summer, 2007

Presenter : Koshikawa H., Higashi H., Kawachi M., Hasegawa T., Okamura K., Kiyomoto Y., Nishiuchi K., Akiyama H., Kohata K., Murakami S.
Name of Society : PICES 2009 Annu.Meet. (2009)
Name of Proceedings : Abstracts, 149
Monitoring impact of oil biostimulation treatment on indigenous bacterial communities by DGGE and clone library analyses

Presenter : Koshikawa H.
Name of Society : 5th Int.Conf.Environ.Manage.Enclosed Coastal Seas (2001)
Name of Proceedings : Abstracts

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A Numerical Model to Assess the Effects of Adaptive Nutrient Management on Coastal Environment and Biological Productivity

Presenter : Higashi H., Umehara A., Hamawaki R., Koshikawa H., Nishijima W.
Name of Society : The International Society for Ecological Modelling Global Conference 2025 (2025)
Name of Proceedings : abstracts
Practice of Marine Environmental Impact Assessment and Monitoring Using Iso Standards

Presenter : Yamamoto H., Kawachi M., Iijima K., Kawagucci S., Miwa T., Inomata K., Kyo M., Koshikawa H., Tsutsumi K., Yoshida K.
Name of Society : 2023 IEEE Underwater Technology (2023)
Name of Proceedings : Abstracts, 37-41
Large-eddy simulation of tidal bottom boundary layer and behavior of suspended particulate matter on the Okinawa Trough, Japan

Presenter : Furuichi N., Higashi H., Koshikawa H., Furushima Y.
Name of Society : Japan Geoscience Union Meeting 2018 (2018)
Name of Proceedings : Abstracts, AOS11-16
Oxidation and metal dissolution mechanisms of polymetallic sulfide complex in seawater; implications for impact assessment of SMS-mining

Presenter : Fuchida S., Shimada K., Ishibashi J., Matsushita Y., Kawachi M., Koshikawa H.
Name of Society : American Geophysical Union 2018 Fall Meeting (2018)
Name of Proceedings : -
Onboard ecotoxicological technique to qualify the surface water safety during full-scale mining operation of SMS deposits

Presenter : Koshikawa H., Yamagishi T., Fuchida S., Tatarazako N., Kawachi M.
Name of Society : STAR2017, The Pacific Islands Science, Technology, and Resources Conference (2017)
Name of Proceedings : Abstracts, 23
Evaluation of metal dissolution from fresh hydrothermal core samples collected at Izena Hole during CK16-05 and rapid detection of their toxicity on marine phytoplankton community; Environmental impact assessment for seafloor metal-mining

Presenter : Fuchida S., Yamagishi T., Koshikawa H., Kawachi M., Fukuhara T., Kumagai H., Nozaki T., Ishibashi J., Maeda L., CK16-05 shipboard scientists
Name of Society : Japan Geoscience Union Meeting 2017 (2017)
Name of Proceedings : Abstract
Development of methods to assess the toxic effects of heavy metals on microalgae using a microbial viability test

Presenter : Ota S., Yamaguchi H., Yamagishi T., Tatarazako N., Fuchida S., Koshikawa H., Kawachi M.
Name of Society : 8th Asian Pacific Phycological Forum (APPF 2017) (2017)
Name of Proceedings : Abstracts, 153
Periodic behaviors of deep-ocean flow and turbulent mixing in hydrothermal field on the Okinawa Trough, Japan

Presenter : Furushima Y., Furuichi N., Higashi H., Koshikawa H., Yamamoto H.
Name of Society : Oceans 2016 (2016)
Name of Proceedings : Proceedings of OCEANS 2016 MTS/IEEE Monterey Conference & Exhibition
Industrial discharge of chemical oxygen demand in China and its reduction potential towards 2030

Presenter : Akiyama C., Higashi H., Dai H., Okadera T., Koshikawa H., Masui T.
Name of Society : 11th Conference on Sustainable Development of Energy, Water, and Environment Systems, SDEWES2016 (2016)
Name of Proceedings : Proceedings of the 11th Conference on Sustainable Development of Energy, Water, and Environment Systems, SDEWES2016., 1-8
Simulation of the Non-point Source of Nitrogen and Phosphorus Loads under Different Land Uses in the Yangtze River Basin, China

Presenter : Wang Q-X., Xiao Q., Koshikawa H.
Name of Society : 日本地球惑星科学連合2016年大会 (2016)
Name of Proceedings : Abstracts, 2016(HSC04-05)
Observations of turbulence in the summer East China Sea

Presenter : Furuichi N., Higashi H., Koshikawa H., Hasegawa T., Nishiuchi K, Yamada H
Name of Society : PICES 2014 Annual Meeting (2014)
Name of Proceedings : Abstracts, 171-171
A Numerical Study on Relationships between Climate Change and Short-Necked Clam (Ruditapes philippinarum) Biomass in 1990s in Ise Bay, Japan

Presenter : Higashi H., Hanamachi Y., Koshikawa H., Murakami S., Kohata K.
Name of Society : 9th International Symposium on Ecohydraulics (2012)
Name of Proceedings : Abstracts
Effects of land-based pollution control on coastal hypoxia: a numerical case study of integrated coastal area and river basin management in Ise Bay, Japan

Presenter : Higashi H., Koshikawa H., Murakami S., Kohata K., Mizuochi M., Tsujimoto T.
Name of Society : The 18th Biennial Conference of International Society for Ecological Modelling (2011)
Name of Proceedings : Procedia Environmental Sciences, 13:232-241
A numerical study of climate change impacts on growth and population dynamics of the short-necked clam ruditapes philippinarum in Ise Bay, Japan

Presenter : Higashi H., Hanamachi Y., Koshikawa H., Murakami S., Kohata K., Mizuochi M.
Name of Society : 8th Int.Symp.Ecohydraulics 2010 (2010)
Name of Proceedings : Proceedings, 1820-1827
Evaluation of galvanic effects of sulfide mineras on metal dissolution from hydrotehrmal sulfides in seawater; implications for impact assessment of SMS-mining on marine environment

Presenter : Fuchida S., Koshikawa H., Kawachi M.
Name of Society : AGU Fall Meeting 2019 (2019)
Name of Proceedings : Abstracts
DEEP SEA MINING AND ITS POSSIBLE IMPACT ON SURFACE PHYTOPLANKTON AT HYDROTHERMAL FIELDS

Presenter : Koshikawa H., Fuchida S., Yokoyama A., Tsuboi S., Yamagishi T., Kawachi M.
Name of Society : ASLO 2017 Aquatic Sciences Meeting (2017)
Name of Proceedings : -
Possible impact of seafloor mining on surface microbial diversity at Okinawa Trough

Presenter : Kawachi M., Yamaguchi H., Tsuboi S., Fuchida S., Yamagishi T., Koshikawa H.
Name of Society : ASLO 2017 Aquatic Sciences Meeting (2017)
Name of Proceedings : -
Arsenic contaminations and its effect on marine phytoplankton during seafloor mining

Presenter : Fuchida S., Koshikawa H., Tsuboi S., Furuichi N., Yamamoto H., Kawachi M.
Name of Society : Goldschmidt Conference 2016 (2016)
Name of Proceedings : Abstract
Risk of heavy metal and arsenic contaminations and its effect on marine phytoplankton during seafloor mining

Presenter : Fuchida S., Koshikawa H., Tsuboi S., Furuichi N., Yamamoto H., Kawachi M.
Name of Society : japan Geoscience Union Meeting 2016 (2016)
Name of Proceedings : Abstract
A large-eddy simulation study of the tidal bottom boundary layer and the behavior of suspended particulate matter on the Okinawa Trough, Japan

Presenter : Furuichi N., Higashi H., Koshikawa H., Furushima Y.
Name of Society : 2016 Ocean Sciences Meeting (2016)
Name of Proceedings : Abstracts, (PO24A-2928)
Possible impacts of seafloor mining on phytoplankton communities at hydrothermal fields

Presenter : Koshikawa H., Fuchida S., Tsuboi S., Yamagishi T., Yokoyama A., Kawachi M.
Name of Society : ACO2016, A connected ocean & EuroGOOS joint workshop program (2016)
Name of Proceedings : -
A Numerical Study on Predominance of Dinoflagellates on the Central Continental Shelf of the East China Sea

Presenter : Higashi H., Koshikawa H., Wang Q-X., Mizuochi M., Hasegawa T., Kiyomoto Y., Nishiuchi K., Okamura K., Sasaki H., Gomi Y., Akiyama H., Kohata K., Murakami S.
Name of Society : PICES 2012 Annual Meeting (2012)
Name of Proceedings : Abstracts, 208
Relationship between water quality trend and climate change in Ise Bay, Japan

Presenter : Higashi H., Koshikawa H., Kohata K., Murakami S., Mizuochi M.
Name of Society : PICES 2009 Annu.Meet. (2009)
Name of Proceedings : Abstracts, 209
Dominance of the dinoflagellate Prorocentrum dentatum on the central continental shelf of the East China Sea in early summer, 2007

Presenter : Koshikawa H., Higashi H., Kawachi M., Hasegawa T., Okamura K., Kiyomoto Y., Nishiuchi K., Akiyama H., Kohata K., Murakami S.
Name of Society : PICES 2009 Annu.Meet. (2009)
Name of Proceedings : Abstracts, 149

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A Study on Nitrogen and Phosphorus Pollution and its Reduction Strategies in the Yangtze River Basin

Presenter : Wang Q-X., Xiao Q., Koshikawa H., Higashi H., Liu C., Wang K-L., Song X-F., Ye M.
Name of Society : Pollution Process and Control of Nitrogen and Phosphorus in River Basin (2015)
Name of Proceedings : -
Prediction of Nitrogen and Phosphorus Pollutant Loads from the Yangtze River Basin

Presenter : Wang Q-X., Xiao Q., Koshikawa H., Higashi H., Liu C., Wang K-L., Song X-F., Ye M.
Name of Society : The 3rd International Symposium on Sustainable Agriculture for Subtropical Regions (ISSASR-3 2015) (2015)
Name of Proceedings : -
Phyto-Alert System for monitoring surface water quality and safety based on in situ phytoplankton health

Presenter : Koshikawa H.
Name of Society : SIP On-line Seminar 2022 (2022)
Name of Proceedings : -
Environmental pollution monitoring system using bioassay

Presenter : Koshikawa H., Kawachi M.
Name of Society : EcoDeep SIP Workshop II (2017)
Name of Proceedings : Abstracts, 20

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KOSHIKAWA Hiroshi

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