- 2019 - 2023 Documentation of Endangered Languages and Cultures of Northeast India
- 2018 - 2022 Documentation of endangered languages in Munda
- 2016 - 2019 Conservation of Plant Genetic Resources in Southeast Asia toward Implementation of Farmers' Rights
- 2016 - 2019 Beyond Arbitariness: Typological research on expressives
- 2014 - 2018 Reconstructing the Social Landscape of the Indus Civilization through the Study of Excavated Burial Grounds
- 2014 - 2017 A descriptive study on grammar of South Asian languages-a typological point of view
- 2012 - 2015 Field Survey of Semi-domesticated and less-utilized plants in Asia and Re-investigation of Agriculture Basic Complex
- 2009 - 2013 Typological Studies on South Asian Languages- Rethinking on South Asian Linguistic Area
- 2006 - 2012 Environmental Change and Indus Civilization
- 2010 - 2012 Comparative study on early agriculture and pasturage in Afro-Eurasia
- 2006 - 2009 Studies and construction of database on expressives in Mundari
- 2005 - 2007 A Lexical and Grammatical Survey of Minority Languages in South and Southeast Asia
- 2001 - 2004 The construction of database to compile the Munda etymological dictionary.
- 2002 - 2004 A construction of database for conpiling Munda Etymological Dictionary
- 2001 - 2002 The State-of-Art for Japanese genefic relationship
- 1998 - 2001 A Preliminary Study for the Munda Etymological Dictionary
- 1998 - 2000 インド言語領域論からみたインド東部の少数民族の言語状況とデータ収集
- 1995 - 1998 Making a Mundari-Hindi-Japanes Dictionary by computer
- 1994 - 1996 Research on Trans-cultural Feature of Japanese Everyday Life
- 1993 - 1995 A psycho-anthropological study on cultural differences
- Research for collecting a basic vocabulary in Indian Language
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