- 2023 - 2027 Shifting Political Centers and Water Systems: Formation and Expansion of Groups and States, and Metropolitan Areas in Afro-Eurasia
- 2020 - 2024 Synthetic Research on the Document Sources of the Mongol Empire
- 2019 - 2023 前近代ユーラシア世界における広域諸帝国の総合的研究:移動する軍事力と政治社会
- 2018 - 2022 A comprehensive study on the north-south transportation system of the pre-modern Central Eurasia
- 2014 - 2018 [分担]学際的視点からみた国際貿易都市博多の総合的研究
- 2014 - 2018 Study on the Mongol - Song War: Comprehensive Analysis of the Historical Documents, Battle Sites, and Relics
- 2014 - 2017 [Co-Investigator] System of Transcription of the Non-Chinese Personal Names in the Chinese Sources of the Mongol Period
- 2011 - 2016 [Co-Investigator] The Research and Study of the Shipwrecks at the Mongol Invasions Using the Underwater Archaeological Method
- 2012 - 2015 [Co-Investigator] A Study of New History of Eurasia
- 2012 - 2014 [Co-Investigator] A Study on Migration of Ancient Nomads and Formation of Gropes in Mongolia
- 2011 - 2014 Study of the multiracial fusion social history of Henan and Shanxi districts ;Trial of the local social history elucidation by epitaph historical materials in China
- 2010 - 2014 [Co-Investigator] Research on the textual materials and historical ruins in the eastern part of the Silk Road: In search for a new historical viewpoint and a new science for the unearthed textual materials
- 2010 - 2014 A Study on the Transformation of Pluralistic Societies in North China under the Mongol Empire Based on the Analysis on Excavated Materials and Stone Inscriptions
- 2011 - 2012 [Co-Investigator] A Study on Lineages and Religions as Social Networks in Pre-modern North China
- 2010 - 2012 [Co-Investigator] Ethnic Groups and Society in Borderlands between Sedentary and Nomadic Zones
- 2008 - 2011 [Co-Investigator] Grasping and Analyzing Mongolian-Expedition-Related Archaeological Sites and Remains on the Seabed of Takashima
- 2008 - 2011 [Co-Investigator] A study on the multilayer rule by Mongol Empire to the China society The new development of historical materials studies for the Yuan dynasty
- 2007 - 2011 [Co-Investigator] A Comparative Study of the Documents in East Asia before Modern Age
- 2009 - 2010 [Co-Investigator] International Education Program Utilizing Consortium of East Asian History
- 2007 - 2010 [Co-Investigator] Comprehensive Research on Liao-Jin-Xixia Linguistics, History, and Religion
- 2006 - 2009 A Study on the Mutual Relationship between the Administration by Official Documents and Local Society in Jin-Yuan Huabei: With Special Reference to the Inscriptions
- 2007 - 2008 The Survey and Research on Jin-Yuan Inscriptions in the Northen Shanxi Province, China
- 2004 - 2008 [Co-Investigator] Medieval Japan and international relations Viewed from Korean books
- 2005 - 2007 [Program Member] East Asia and Japan: Interaction and Transformations
- 2004 - 2007 [Co-Investigator] General Research on Historical Documents in the 13-14th century East Asia
- 2004 - 2006 [Research Assistant] A Basic Research on New Discovered Original Sources of Ethnic Groups in Eastern Eurasia
- 2005 - 2006 A Historical Study on Religious Pluralism of Local Cites in China
- 2004 - 2006 [Co-Investigator] Research of KharaKhota
- 2003 - 2005 The Document Administration System of the Mongol-Yuan Empire and its Ethnic and Linguistic Aspects
- 2001 - 2002 Short-term Student Exchange Promotion Program (Outbound) Scholarship
- 1999 - 2000 Soukichi Tsuda Memorial Scholarship
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- 2019/04 - The Society of Hiroshima for Historical Studies Director
- 2019/04 - 広島史学研究会 理事
- 2018/09 - 2019/03 Prefectural University of Hiroshima Lecturer (part-time)
- 2018/09 - 2019/03 県立広島大学 非常勤講師
- 2017/10 - 2018/03 Kyushu University Lecturer (part-time)
- 2017/10 - 2018/03 九州大学 非常勤講師
- 2017/09 - 2018/03 Prefectural University of Hiroshima Lecturer (part-time)
- 2017/09 - 2018/03 県立広島大学 非常勤講師
- 2017/05 - Japanese Association for Mongolian Studies Director
- 2017/05 - 日本モンゴル学会 理事
- 2017/04 - The Society of Hiroshima for Historical Studies Councilor
- 2017/04 - 広島史学研究会 評議員
- 2005/04 - 2016/09 The Historical Society of Kyushu Commissioner
- 2005/04 - 2016/09 九州史学会 委員
- 2008/06 - 2016/08 The Association for Kyushu and Silkroad Secretary General
- 2008/06 - 2016/08 九州・シルクロード協会 事務局長
- 2016/04 - The Society of Inner Asian Studies Editor
- 2016/04 - 内陸アジア史学会 編集委員
- 2016/04 - The Society of Inner Asian Studies Director
- 2016/04 - 内陸アジア史学会 理事
- 2012/09 - 2013/08 Department of Central Eurasian Studies, Indiana University Visiting Scholar
- 2012/09 - 2013/08 インディアナ大学中央ユーラシア学部 訪問学者
- 2012/04 - Institute of Central Eurasian History and Culture, Comprehensive Research Organization, Waseda University Visiting Researcher
- 2012/04 - 中央ユーラシア歴史文化研究所早稲田大学総合研究機構 招聘研究員
- 2010/04 - 2012/03 The Research Institute for Oriental Cultures, Gakushuin University Guest Researcher
- 2010/04 - 2012/03 学習院大学東洋文化研究所 客員研究員
- 2007/04 - 2012/03 Fukuoka University Lecturer (part-time)
- 2007/04 - 2012/03 福岡大学 非常勤講師
- 2007/11 - 2011/03 Institute for Mongolian Studies, Comprehensive Research Organization, Waseda University Guest Researcher
- 2007/11 - 2011/03 早稲田大学総合研究機構モンゴル研究所 客員研究員
- 2007/04 - 2010/03 Research Institute for Languages and Cultures of Asia and Africa, Tokyo University of Foreign Studies Joint Researcher
- 2007/04 - 2010/03 東京外国語大学アジア・アフリカ言語文化研究所 共同研究員
- 2008/06 - The Association for Kyushu and Silkroad Editor
- 2008/06 - 九州・シルクロード協会 編集委員
- 2008/06 - The Association for Kyushu and Silkroad Commissioner
- 2008/06 - 九州・シルクロード協会 運営委員
- 2008/06 - The Association for Kyushu and Silkroad Director
- 2008/06 - 九州・シルクロード協会 理事
- 2005/04 - 2007/10 Institute for Mongolian Studies, Comprehensive Research Organization, Waseda University Guest Researcher
- 2005/04 - 2007/10 早稲田大学総合研究機構モンゴル研究所 客員研究員
- 2000/11 - 2005/03 The Society of Inner Asian Studies Secretary
- 2000/11 - 2005/03 内陸アジア史学会 幹事
- 1998/04 - 2001/03 The Society of Asian Studies, Waseda University Editor
- 1998/04 - 2001/03 早稲田大学東洋史懇話会 編集委員
- 1998/04 - 2001/03 The Society of Asian Studies, Waseda University Secretary
- 1998/04 - 2001/03 早稲田大学東洋史懇話会 幹事
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Society for Liao, Jin and Xi-xia Studies
, Toyoshi Konwakai (The Society of Asian Studies), Waseda University
, The Nairiku Ajiashi Gakkai / The Society of Inner Asian Studies
, The Japanese Association for Mongolian Studies
, The Chinese National Association of Yuan Studies
, Chugoku Shikoku Rekishigaku Chirigaku Kyokai
, Hiroshima Shigaku Kenkyukai (The Society of Hiroshima for Historical Studies)