- 2022 - 2025 インドネシアを対象としたプラスチック類の河川からの流出量の実態調査
- 2017 - 2020 Evaluation and dynamics analysis for phosphorus load from the watershed using bioavailable phosphorus
- 2014 - 2019 Development of underground resources in Mongolia, especially the mercury pollution assessment caused from gold mining
- 2012 - 2014 Dynamics of mercury in forest watershed
- 2011 - 2014 Reconstruction of estuarine environments in an era of global warming
- 2010 - 2012 Investigation of Mercury Contamination in the Intensive Artisanal and Small-scale Gold Mining Area in Indonesia
- 2007 - 2008 Study of measurement, movement and control of N-compound in surface water on watershed
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