Research theme for competitive and other funds (4)：
2022 - 2025 ICP-MSで読み解く耳石に刻まれた海水魚のSr-90取り込み履歴
2019 - 2024 Investigations of the effect of the world's highest level of natural radioactivity on reproductive activity of wild and domestic animals in Kerala, India
2018 - 2019 Agilent8800を用いた安定セシウム測定精度向上方法の検討
2016 - 2019 歯の放射能測定による福島第一事故被災動物の内部被ばく線量の評価
Papers (30)：
Koarai Kazuma, Matsueda Makoto, Watanabe Yusuke, Terashima Motoki. Measurement and analytical method development of radionuclides in marine products collected off Fukushima coast. Proceedings of the 25th Workshop on Environmental Radioactivity. 2025. 151-156
Koarai Kazuma, Matsueda Makoto, Aoki Jo, Terashima Motoki. Application of the Y separation method using DGA resin for the measurement of $^{90}$Sr in human teeth and marine fish bones. Proceedings of the 24th Workshop on Environmental Radioactivity. 2023. 155-160
Yusuke Watanabe, Motoki Terashima, Makoto Matsueda, Kazuma Koarai, Jo Aoki, Junya Inoue. Removal processes of dissolved elements in groundwater leached from waste by redox reaction. Goldschmidt2023 abstracts. 2023
Koarai Kazuma, Matsueda Makoto, Terashima Motoki. Development of an analytical method for $^{90}$Sr with ICP-MS/MS using O$_{2}$ and NH$_{3}$ mixed gas reaction. Proceedings of the 23th Workshop on Environmental Radioactivity. 2022. 102-107
Matsueda Makoto, Aoki Jo, Koarai Kazuma, Terashima Motoki, Takagai Yoshitaka*. Mass-spectrometric determination of iodine-129 using O$_{2}$-CO$_{2}$ mixed-gas reaction in inductively coupled plasma tandem quadrupole mass spectrometry. Analytical Sciences. 2022. 38. 11. 1371-1376
Koarai Kazuma. Development of a rapid analysis method for OBT with combustion cell. Kankyo Sozo Senta Chosa Kenkyu Seika Hokokusho, Heisei 27-Nendo (2015) $\sim$ Reiwa 6-Nendo (2024) (Internet). 2025. 20
Koarai Kazuma. Study on the uptake of $^{90}$Sr and $^{137}$Cs into wild animals after the Fukushima Daiichi Nuclear Power Plant accident using hard tissue as an indicator. Hosha Kagaku. 2023. 47. 24-27
Low-Dose Radiation Effects on Animals and Ecosystems
Springer 2019 ISBN:9789811382185
Lectures and oral presentations (66)：
Development of an analytical method for $^{90}$Sr in using ICP-DRC-MS/MS with O$_{2}$+NH$_{3}$ reaction gas
(7th Asia-Pacific Symposium on Radiochemistry (APSORC 2025))
Establishing safety assessment methods for rational processing and disposal of 1F decommissioning waste, 6; Scenario extraction based on migration behavior of radionuclide from shallow subsurface to surface environment and its application to safety assessment of biosphere
(日本原子力学会2025年秋の大会)
Study of gas adsorption on the surface of NEG materials by HAXPES
(第38回日本放射光学会年会・放射光科学合同シンポジウム)
Tissue free water tritium and organically bound tritium in flatfishes of Fukushima coast before and after the discharge of treated water from the Fukushima Daiichi Nuclear Power Station
(6th International Conference on Radioecology \& Environmental Radioactivity (ICRER 2024))
BeCu material vacuum chamber with NEG coating
(10th International Symposium on Surface Science (ISSS-10))
