Osaka Kenichi

オサカケンイチ | Osaka Kenichi

Affiliation and department：
Job title： Associate Professor
Other affiliations (1)：

THE UNIVERSITY OF SHIGA PREFECTURE School of Environmental Science Department of Ecosystem Studies

Research field (1)： Environmental dynamics

Research keywords (1)： Forest Hydrology, Biogeochemistry

Research theme for competitive and other funds (10)：

2022 - 2024 流域生態系の栄養バランスを診断する安定同位体手法の開発
2020 - 2023 Influence of changes in lake water circulation processes due to global warming on denitrification in the sediment at Lake Biwa
2018 - 2021 Relationship between nutrient loading and fisheries yield: Does water quality control cause fisheries yield to deteriorate?
2017 - 2020 Re-evaluation of water purification function of the forest with high frequency measurements of water chemistry
2017 - 2020 Isotopic study on interaction between nitrogen deposition, retention, export in forested watersheds.

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Papers (43)：

Takuya Ishida, Noboru Okuda, Shin-ichi Onodera, Mitsuyo Saito, Yusuke Tomozawa, Xin Liu, Naoshige Goto, Ken'ichi Osaka, Masahiro Maruo, Ichiro Tayasu, et al. Phosphate oxygen isotope insights into the coupled distribution of phosphorus, iron, and manganese in lake sediments. Chemical Geology. 2025. 683. 122754-122754
Setogawa, M., Domitsu, H., Sakai, S., Osaka, K., Katsuyama, M. Water-temperature equation based on oxygen isotope records of cultured freshwater bivalve Corbicula sandai shells from Lake Biwa, Japan. Journal of Paleolimnology. 2025
Kato, N., Osaka, K., Ohtsuka, T., Iimura, Y. Root exudates in mangrove forests accelerate bicarbonate production in the soil environment. Scientific Reports. 2024. 14. 1
Osaka, K., Takatsu, M., Ishibashi, T., Chishiro, S., Nakamura, T. The sources of nitrate exported from a watershed containing mixed forest, paddy fields, and urban areas in Japan: differences between baseflow conditions and rainfall events. Limnology. 2024. 26. 1. 75-89
Osaka, K., Nagata, R., Inoue, M., Ito, M., Hosoi-Tanabe, S., et al. A simple, safe method for preserving dissolved methane in freshwater samples using benzalkonium chloride. Limnology and Oceanography: Methods. 2024. 22. 8. 536-547

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MISC (2)：

Osaka, K., Nakamura, T., Nishida, K., Kazama, F. Improvement of analysis for nitrogen and oxygen isotopes of nitrate using denitrifier method: Challenge to reduce methodological blank. Annual report 2009,GCOE program. 2009. 29-31
鈴木希実, 木庭啓介, 伊藤雅之, 尾坂兼一, 大手信人, 戸張賀史, 勝山正則, 山田桂大, 永田俊. 安定同位体比を用いた森林土壌におけるメタン動態の解析. 日本生態学会大会講演要旨集. 2005. 52nd. 188

Books (2)：

「サンタローザ流域における共通の関心(Boundary Object)」in 流域ガバナンス
京都大学学術出版会 2020
Hydrologic controls on the nitrogen dynamics of forested ecosystems investigated using water and nitrate isotope signatures, In: Earth, Life, and Isotopes
Kyoto University Press 2010 ISBN:9784876989607

Lectures and oral presentations (16)：

攪乱発生流域における30年間の硝酸イオン濃度-流量関係の変化
(第136回日本森林学会大会 2025)
亜熱帯マングローブ林における根滲出物の定量的評価
(第72回日本生態学会大会 2025)
溶存酸素が浅い富栄養湖堆積物表層での温室効果ガス生成に与える影響
(日本農業気象学会2025年全国大会 2025)
溶存酸素が浅い富栄養湖の湖底有機物分解に与える影響
(日本農業気象学会関東甲信越支部会 2024)
Long-term changes in nitrate runoff in a temperate forest catchment in Japan: Multiple ecosystem responses flowing a die-back disturbance by pine silt disease
(Annual Meeting of American Geophysical Union 2024)

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Education (2)：

Professional career (1)：

Work history (5)：

2022/04 - 現在 The University of Shiga Prefecture School of Environmental Science Department of Ecosystem Studies Associate Professor
2019/04 - 2022/03 The University of Shiga Prefecture School of Environmental Science Department of Ecosystem Studies Lecturer
2010/08 - 2019/03 The University of Shiga Prefecture School of Environmental Science Department of Ecosystem Studies Assistant Professor
2009/04 - 2010/07 山梨大学医学工学研究部国際流域環境研究センター研究員
2007/04 - 2009/03 独立行政法人農業環境技術研究所研究員

Association Membership(s) (5)：

土壌肥料学会 , 水環境学会 , AGU , 陸水学会 , ASLO

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