- 2021 - 2025 Fundamental Study of Historical Archaeology on Early Modern Kagoshima Castle Town
- 2018 - 2021 High precision chronology of palaeoenvironments in the past 33,000 years in southern Kyushu and Nansei Islands based on tephrochronology
- 2018 - 2021 東ポリネシアにおける人類到達時期とその後の植生改変
- 2015 - 2018 Studies on Quaternary crustal movements and volcanic activities of gigantic calderas
- 2015 - 2018 Study on environmental conservation and sustainable sightseeing related it in New Zealand
- 2011 - 2015 A study of the use of land of one village in the Heian era
- 2012 - 2015 Studies on a high-precision chronology for tephras and palaeoenvironments in southern Kyushu since 30,000 cal BP
- 2009 - 2011 Study on the Quaternary crustal movement of gigantic calderas based on the chronology of tephra and palaeoenvironment
- 2008 - 2010 Study on the Holocene sea-level change and coastal evolution in the Cook Islands, south Pacific
- 2003 - 2006 Study on the identification of Quaternary tephras in southern Kyushu based on EPMA analysis
- 2003 - 2005 Tephrostratigraphical interpretation of historical eruptions proved by historic sites and historical sources and reconstruction of paleoenvironment
- 2001 - 2003 A study on accurate age determination of volcanic eruptions by high-precision 140 dating and a wiggle matching analysison charred wood from volcanic deposits
- 1998 - 2001 巨大カルデラの第四紀地殻変動に関する研究
- 1995 - 1997 Studies on Conservation of Culture Heritage in Cook Islands
- 1993 - 1995 A role of large-scale volcanism in global environmental changes
- 1994 - 1994 中国長白山の巨大噴火の年代と環境への影響に関する年輪年代学的研究
- 1993 - 1993 火山噴火が気候と文明に与えた影響
- 1992 - 1993 Paleo-environmental study on Late Quaternary fine-grained volcanic ash beds around Kagoshima University
- 1992 - 1992 火山噴火が気候と文明に与えた影響
- 1991 - 1991 火山噴火が気候と文明に与えた影響
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