Miyakawa Kazuya

ミヤカワカズヤ | Miyakawa Kazuya

Affiliation and department：
Job title： Principal Scientist

Research field (1)： Solid earth science

Research keywords (4)： Geological disposal of high-level radioactive waste , hydrogeology , Groundwater geochemistry , Gas geochemistry

Research theme for competitive and other funds (8)：

2025 - 2028 Meta-model construction for the interaction between radionuclides and natural organic matters by data fusion and exploration
2023 - 2027 Development of a nuclear emergency remote monitoring system for plume dispersion in the atmosphere
2022 - 2025 Development of the new method to detect water-conducting faults and fractures by high-precision gas concentration mapping
2019 - 2022 Research on deep groundwater components affecting actinide migration
2018 - 2021 Variety of natural organic matters in deep underground and their impacts on radionuclide migration

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Papers (49)：

Ueno Akio*, Sato Kiyoshi*, Tamamura Shuji*, Murakami Takuma*, Inomata Hidenori*, Tamazawa Satoshi*, Amano Yuki, Miyakawa Kazuya, Naganuma Takeshi*, Igarashi Toshifumi*. {\it Gaoshiqia hydrogeniformans} sp. nov., a novel hydrogen-producing bacterium isolated from a deep diatomaceous shale formation. International Journal of Systematic and Evolutionary Microbiology. 2025. 75. 6. 006802\_1-006802\_11
Kuribayashi Chika*, Miyakawa Kazuya, Ito Akane*, Tanimizu Masaharu*. Large disequilibrium of $^{234}$U/$^{238}$U isotope ratios in deep groundwater and its potential application as a groundwater mixing indicator. Geochemical Journal. 2025. 59. 2. 35-44
Miyakawa Kazuya, Ishii Eiichi, Imai Hisashi*, Hirai Satoru*, Ono Hirokazu, Nakata Kotaro*, Hasegawa Takuma*. Effective porosity in groundwater flow analysis for fractured sedimentary rocks; Case studies of the Koetoi and Wakkanai formations in Horonobe, Hokkaido, Japan. Genshiryoku Bakkuendo Kenkyu (CD-ROM). 2024. 31. 2. 82-95
Yuki Amano, Rohan Sachdeva, Daniel Gittins, Karthik Anantharaman, Shufei Lei, Luis E. Valentin-Alvarado, Spencer Diamond, Hikari Beppu, Teruki Iwatsuki, Akihito Mochizuki, et al. Diverse microbiome functions, limited temporal variation and substantial genomic conservation within sedimentary and granite rock deep underground research laboratories. Environmental Microbiome. 2024. 19. 1
Akio Ueno, Kiyoshi Sato, Shuji Tamamura, Takuma Murakami, Hidenori Inomata, Satoshi Tamazawa, Yuki Amano, Kazuya Miyakawa, Takeshi Naganuma, Toshifumi Igarashi. Complete genome sequence of Thiomicrospira sp. strain V2501 isolated from 250 m below the ground level in Horonobe, Hokkaido, Japan. Microbiology Resource Announcements. 2024. 13. 11

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MISC (21)：

Miyakawa Kazuya, Hayano Akira, Sato Naomi, Nakata Kotaro*, Hasegawa Takuma*. HFB-1 borehole survey data collection. JAEA-Data/Code 2023-009. 2023. 103
Miyakawa Kazuya, Nakata Kotaro*. Data of groundwater chemistry obtained in the Horonobe Underground Research Laboratory Project (FY2022). JAEA-Data/Code 2022-013. 2023. 19
Kazuya Miyakawa, Hajime Yamamoto. Spatial distribution of desaturation around the tunnel predicted by three-dimensional two-phase flow modeling of the degassing process of dissolved gases in groundwater. JAEA-Research. 2022. 2022-003
Kazuya Miyakawa. Data of groundwater chemistry obtained in the Horonobe Underground Research Laboratory Project (FY2021). JAEA-Data/Code. 2022. 2021-021
下茂道人, 丹羽正和, 宮川和也, 戸野倉賢一, 徳永朋祥. Identification of gas migration pathways around faults and fold axes using high-precision methane measurement technology. 日本地球惑星科学連合大会予稿集(Web). 2022. 2022

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Lectures and oral presentations (95)：

Development of visualization technology of deep underground facilities and prediction of parameters using AI
(日本原子力学会2025年秋の大会)
Molecular characterization and ion binding properties of deep underground dissolved organic matters using fluorescence spectroscopy and high-resolution mass spectrometry
(19th Conference on the Migration of Actinides and Fission Products in the Geosphere (Migration '25))
Groundwater-level changes due to seismic shakings in confined Neogene formations, Horonobe, Japan; Implications for delineating active flow conduits in deep underground
(日本地質学会第132年学術大会(2025熊本大会))
{\it Altiarchaeota}-dominated veins in siliceous mudstone with residual fossil seawater from the deep terrestrial subsurface
(日本地球惑星科学連合2025年大会(JpGU2025))
Molecular characterization of reactive deep underground dissolved organic matters for metal ion using fluorescence spectroscopy and high-resolution mass spectrometry
(Interfaces Against Pollution 2024 (IAP 2024))

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Education (3)：

2008 - 2011 Nagoya University Department of Earth and Environmental Sciences PhD (Doctor of Science)
2006 - 2008 Nagoya University Department of Earth and Environmental Sciences MSc
2002 - 2006 Nagoya University Department of Earth and Planetary Sciences BSc

Professional career (1)：

Doctor of Science (Nagoya University)

Work history (5)：

2025/07 - 現在 Japan Atomic Energy Agency Nuclear Fuel Cycle Engineering Laboratories, Nuclear Backend Technology Development Department, Waste Disposal System Development Group Principal Researcher
2024/11 - 2025/06 Japan Atomic Energy Agency Nuclear Fuel Cycle Engineering Laboratories, Nuclear Backend Technology Development Department, Waste Disposal System Development Group Senior Scientist
2020/10 - 2022/03 Japan Atomic Energy Agency Sector of Decommissioning and Radioactive Waste Management, Horonobe Underground Research Center, Horonobe Underground Research Department, Sedimentary Environment Research Group Senior Scientist
2011/06 - 2014/05 Japan Atomic Energy Agency Geological Isolation Research and Development Directorate, Horonobe Underground Research Unit, Sedimentary Environment Research Group Postdoctral researcher
2011/04 - 2011/05 Nagoya University Graduate School of Environmental Studies, Department of Earth and Environmental Sciences Postdoctral researcher

Awards (6)：

2025/03 - 日本原子力学会バックエンド部会論文賞亀裂性堆積岩を対象とした地下水流動解析における有効間隙率の与え方:北海道幌延に分布する声問層と稚内層浅部の事例
2021/05 - Japanese Association of Groundwater Hydrology Research encouragement award (2019-2020) Evaluation of uncertainty of redox potential in deep groundwater: A case study in the Horonobe area, Hokkaido
2019/10 - Japan Atomic Energy Agency 理事長表彰研究開発功績賞特賞地層処分システムにおける微生物影響評価手法の開発
2017/09 - ICGG Committee the second place in the Best Poster Competition
2015/08 - ICGG Committee The best poster presentation award

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Association Membership(s) (4)：

JAPAN GEOSCIENCE UNION , SEISMOLOGICAL SOCIETY OF JAPAN , THE GEOLOGICAL SOCIETY OF JAPAN , GEOCHEMICAL SOCIETY OF JAPAN

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