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J-GLOBAL ID：200901012844762816 Update date: Apr. 22, 2025

Tosaki Yuki

トサキユウキ | Tosaki Yuki

Affiliation and department：
Job title： Senior Researcher

Research field (5)： Space and planetary science , Solid earth science , Atmospheric and hydrospheric science , Environmental dynamics , Geography

Research keywords (14)： groundwater flow , hydrogeology , groundwater age , radioactive waste disposal , sea-level change , groundwater hydrology , groundwater flow system , groundwater dating , isotope hydrology , cosmogenic nuclide , isotope , hydrology , groundwater , accelerator mass spectrometry

Research theme for competitive and other funds (3)：

2010 - 2013 Analysis of decadal to millennial scale variation of Cosmic Ray intensity recorded in ice core and its implication for the earth environment
2009 - 2012 Development of the research method for earth's environmental fate byultra-trace radionuclide analysis using Accelerator Mass Spectrometry
2007 - 2010 Groundwater dating and groundwater flow system of Mt. Fuji

Papers (29)：

Yuki Tosaki, Noritoshi Morikawa, Kohei Kazahaya, Hitoshi Tsukamoto, Tsutomu Sato, Hiroshi A. Takahashi, Masaaki Takahashi, Akihiko Inamura. Deep groundwater flow in the Kamikita Plain, Japan, inferred from geochemical tracers including ³⁶Cl. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 2023. 535. 205-214
R. Purtschert, A.J. Love, W. Jiang, Z.-T. Lu, G.-M. Yang, S. Fulton, D. Wohling, P. Shand, W. Aeschbach, L. Broder, et al. Residence times of groundwater along a flow path in the Great Artesian Basin determined by ⁸¹Kr, ³⁶Cl and ⁴He: Implications for palaeo hydrogeology. Science of The Total Environment. 2023. 859. 159886
Kimikazu Sasa, Yuta Ochiai, Yuki Tosaki, Tetsuya Matsunaka, Tsutomu Takahashi, Masumi Matsumura, Keisuke Sueki. Chlorine-36 deposition at Tsukuba, Japan, after the Fukushima Daiichi Nuclear Power Plant accident. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 2022. 532. 73-77
Yoko S. Togo, Kohei Kazahaya, Yuki Tosaki, Masaaki Takahashi, Noritoshi Morikawa, Hiroshi A. Takahashi, Yuri Nakamura, Akihiko Inamura, Hinako Shimizu, Hiroyuki Matsuzaki. Detection of slab-derived fluid in coastal area of Seto Inland Sea, Japan, based on ¹²⁹I/¹²⁷I ratios and halogen composition. Chikyukagaku. 2020. 54. 4. 189-200
Fumitake Kusuhara, Kohei Kazahaya, Noritoshi Morikawa, Masaya Yasuhara, Hidemi Tanaka, Masaaki Takahashi, Yuki Tosaki. Original composition and formation process of slab-derived deep brine from Kashio mineral spring in central Japan. Earth, Planets and Space. 2020. 72. 107

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MISC (40)：

Marceau Gresse, Akinobu Miyakoshi, Shogo Komori, Hinako Hosono, Yuki Tosaki, Tsutomu Sato, Daisuke Asahina, Hitoshi Tsukamoto, Makoto Otsubo, Mikio Takeda. Coupled multiphysics approach to characterize groundwater flow system around a near-surface fault zone. 2025
Morikawa, N, Takahashi, M, Inamura, A, Takahashi, H. A, Togo, Y. S, Nakamura, H, Kitamura, Y, Kawabata, K, Kazahaya, K, Yasuhara, M, et al. Chemical and isotopic compositions of hot spring waters, cold spring waters and groundwaters in south Kyushu area, southwest Japan. Open-File Report of the Geological Survey of Japan, AIST. 2024. 757
Yuki TOSAKI, Yoko S. TOGO. Valuable springs in Akita and Yamagata prefectures - including springs revisited. Journal of Groundwater Hydrology. 2024. 66. 1. 43-54
Yuki TOSAKI, Noritoshi MORIKAWA, Hitoshi TSUKAMOTO, Akinobu MIYAKOSHI, Tsutomu SATO, Mikio TAKEDA. Drilling surveys for verification of groundwater flow system. Journal of Japanese Association of Hydrological Sciences. 2022. 52. 2. 61-64
TAKAHASHI, M, INAMURA, A, TAKAHASHI, H. A, MORIKAWA, N, TOGO, Y. S, KAZAHAYA, K, SATO, T, HANDA, H, NAKAMA, A, NAKAMURA, Y, et al. Chemical and isotopic compositions of groundwaters and river waters in Kumamoto, Aso and Kuju area, southwest Japan. Open-File Report of the Geological Survey of Japan, AIST. 2022. 739

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Books (1)：

Cyclopedia of Earth Sciences
Heibonsha 2024 ISBN:9784582115086

Lectures and oral presentations (40)：

Characterizing Fault Zone Hydrology Using a Coupled Geophysical and Modeling Approach
(2025)
Long-term changes in deep groundwater flow in the Kamikita Plain as inferred from chemical and isotopic tracers
(Japan Geoscience Union Meeting 2024 2024)
水文地質情報と地球化学データのGIS解析による上北平野の広域地下水流動評価
(日本地球惑星科学連合2024年大会 2024)
Regional groundwater flow in the Kamikita coastal plain, Japan - Part 1: GIS-based modeling of groundwater chemistry, isotopes and hydrogeological data
(AGU Fall Meeting 2023 2023)
ボーリング調査による小川原湖南~東側地域における地下水流動評価
(水文・水資源学会/日本水文科学会2022年度研究発表会 2022)

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Education (3)：

2005 - 2008 University of Tsukuba Doctoral Program in Geoenvironmental Sciences
2003 - 2005 University of Tsukuba Master’s Program in Environmental Sciences
1999 - 2003 University of Tsukuba College of Natural Sciences

Professional career (1)：

Ph.D. (University of Tsukuba)

Work history (6)：

2020/10 - 現在 National Institute of Advanced Industrial Science and Technology Research Institute of Earthquake and Volcano Geology, Geological Survey of Japan Senior Researcher
2015/04 - 2020/09 National Institute of Advanced Industrial Science and Technology (AIST) Research Institute of Earthquake and Volcano Geology, Geological Survey of Japan Researcher
2018/10 - 2019/09 Secretariat of the Nuclear Regulation Authority (NRA) Division of Research for Nuclear Fuel Cycle and Radioactive Waste Researcher
2010/07 - 2015/03 National Institute of Advanced Industrial Science and Technology (AIST) Research Core for Deep Geological Environments, Geological Survey of Japan Postdoctoral Researcher
2008/12 - 2010/06 University of Tsukuba Sustainable Environmental Studies, Graduate School of Life and Environmental Sciences Assistant Professor

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Committee career (20)：

2025/04 - 現在 Japanese Association of Hydrological Sciences Editor-in-Chief, Editorial Board (Journal of Japanese Association of Hydrological Sciences)
2025/04 - 現在 Japanese Association of Hydrological Sciences Standing Committee
2025/04 - 現在 Japanese Association of Hydrological Sciences Council member
2025/04 - 現在 Hydrological Research Letters Associate Editor
2024/08 - 現在 Japan Geoscience Union Vice Chair, Committee for Diversity Management and Talent Pool

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Awards (2)：

2012/10 - Japanese Association of Hydrological Sciences Excellent Presentation Award 2012 Annual Meeting
2008/08 - Japan Society of Hydrology and Water Resources Young Author Excellent Paper Award 2008

Association Membership(s) (9)：

The Geochemical Society of Japan , International Association of Hydrological Sciences , Japan Geoscience Union , Japanese Association of Hydrological Sciences , Japanese Association of Groundwater Hydrology , Japan Society for AMS Research , The Japan Society of Hydrology and Water Resources , American Geophysical Union , European Geosciences Union

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