- 2009 - 2012 A study on the recovery process of benthic community at the azoic seafloor conditions produced by the drastic events associated with physicochemical changes at the seafloor
- 2003 - 2005 Miocene paleoceanography around the North Pacific based on the activities of past primary producers and benthic organisms
- 2003 - 2005 Bioturbation effects of the feeding behavior of fishes and its paleontological significance
- 2000 - 2002 Significance of the change in mechanism of bioturbation throughout the Phanerozoic on the basis of trace fossil data
- 1997 - 1999 Clarification of change in mode of kife and ethology on the deposit feeders adopt sedentary life style on the basis of trace fossil analysis
- 1995 - 1996 Fundamental research on the fossilization of trace fossils
- 1994 - 1996 Study of Ocean Floor Structure and Evolution by Drilling
- 1992 - 1993 Study of World Ocean Floor by Drilling & Down hole Measurement
- 1991 - 1991 生痕化石Zoophycosの内部構造に関する研究
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