- 2011 - 2012 δ13C and δ15N in Micropterus Salmoides largemouth bass and their scales: a freshwater environmental proxy
- 2007 - 2009 Latitudinal section mapping of pore water constituents in the central and eastern equatorial Pacific
- 2007 - 2009 High resolution environmental variability during the last glaciation using results from lake sediment core and marine sediment core.
- 2007 - 2009 Fluxes of fresh water and heat of submarine groundwater discharge and their influence on the deep convection system : A case study in the Sea of Japan.
- 2007 - 2008 Practice of Education for Global Environment based on Experimental Leaning on Ship-board
- 2004 - 2007 Evaluation of nutrient impact from river to coastal biogeochemical systems as an aspect from material transport processes
- 2003 - 2005 Development of Ba-Si/N diagram in the ocean
- 2001 - 2003 High-resolution reconstruction of environmental change off the east coast of Japan since the last 50,000 years reconded in a marine sediment core.
- 2000 - 2003 Reconstruction of climate change using tropical peat deposit in Indonesia.
- 1999 - 2002 Fundamental study on monitoring of chemical substances concerning environmental change of marginal sea
- 1999 - 2001 Fixation of carbon dioxide and transfer to the deep ocean by biological particles at two stations over Japan Island
- 1996 - 1997 Study on the transport mechanism of chemical substances to the deep sea above the 5m of continental shelf slope at the Japan Trench
- 1995 - 1995 過去の海洋における生物生産性の指標としてのウラン
- 1994 - 1995 Measuring Oceanic Carbon Dioxide
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