- 2023 - 2027 日本海交易と宗教ネットワークから見た歴史的幹線の再発見
- 2018 - 2022 What a comoreehensive survey of the old book collection of the Keiko-kan Hirosaki Clan School can tell us about knowledge acquisition in the early modern Tsugaru region
- 2018 - 2022 Reception and transformation of horse and horse culture in the Japanese archipelago: towards a new historical perspective
- 2018 - 2022 東アジアの視点からみた律令財政の構造的研究
- 2015 - 2018 古代倉庫と国家支配構造に関する基礎的研究
- 2014 - 2017 Comparison historic study on ritual, ceremony, rule structure in the East Asia : About Tang and song change period of China, Korea and Japan
- 2013 - 2017 A Comprehensive Study on Control of the Populace under the Ritsuryo System: A Comparative Study of Ancient Japan and the Tang and the Song Statutes
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