- 2021 - 2026 Holocene climatic changes and high-resolution chronology by integrated research of estuarine varve and tree ring samples
- 2020 - 2023 Coastal sediments as a recorder of past primary productivity - a process-focused study
- 2018 - 2023 The influence of past long-term environmental change on the diversity of phytoplankton and zooplankton
- 2019 - 2022 Elucidation of the change patterns of the land and the coast climate in the Sea of Japan side since the Pliocene based on microfossil analysis
- 2018 - 2022 Reconstruction of precipitation during a few days and weeks by using biotic shells of grow
- 2016 - 2019 Centennial- to millennial scale changes of paleoenvironment, ecology, and human society around bay areas during the Holocene
- 2013 - 2017 Implication to the sediment acidification in brackish water due to the change of sedimentation rate, and its improvement
- 2013 - 2016 Study on temporal changes of environments and ecosystems in the Seto Inland Sea since the early modern times
- 2010 - 2012 The relationship between global warming/cooling and shallow marine environments in the Sea of Japan during the Pliocene
- 2009 - 2011 Expanding of residence time of coastal lagoon water by means of recent sea-level rise and the effect on ecological system
- 2009 - 2011 Reexamination of ages and geological backgrounds of Paleogene and Miocene in Chugoku District
- 2008 - 2010 Anthropogenic environment change and global climatic change after the little ice age recorded in the sediment of coastal lagoon.
- 2005 - 2007 Study on migration, disappearance and evolution of Ostatcoda with relation to the opening and clostire of the Tsushima and Korean Straits during the late Cenozoic
- 2004 - 2006 Study on the system of deposition of organic matter in fore-arc basin and accretionary prism during Paleogene and Neogene
- 2003 - 2005 Establishment of stratigraphical and paleontological methods to understand the dynamics of coastal ecosystem and the abnormal sea-level changes occurred in the 20^<th>.
- 2003 - 2005 Biological product system around the halocline in the brackish water environment and the geological record.
- 2003 - 2004 Paleobiological study of Ostracoda (Crustacea) in relation to paleogeographical changes of Kyushu to the Ryukyu Islands
- 2001 - 2002 第四紀の東アジアにおける海峡の開閉とそれに伴う貝形虫の移動・種分化に関する研究
- 1999 - 2001 Paleobiological study of the litteral ostracod from East Asia
- 1998 - 1999 貝形虫群集および殻の化学分析に基づく第四紀地殻・古環境変動解析法の確立
- 1994 - 1994 Recurrence Time of Large Events on Active Faults in Korea
- 津波・地震イベントに関連した環境変化
- 中国山地の中新統の層序と古生物
- 閉鎖性水域における最近の環境変化
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