- 2024 - 2028 万葉集仙覚校訂本の思想と享受の関係の研究
- 2021 - 2024 文字生活史としての近世庶民の漢字意識ー『小野篁歌字尽』周辺資料を中心としてー
- 2020 - 2023 古代日本語の訓詁と表記体の研究
- 2018 - 2022 万葉集仙覚校訂本の総合的研究-成立過程・校訂の方法・享受の様相の解明-
- 2017 - 2020 Reconstruction of the method for the study of oldJapanese lexcon
- 2012 - 2015 A studay on the relation of Hentaikanbun and Wakankonkoubun,as seen by writing-style and language-style
- 2009 - 2011 A study on a use of kanji for Kana in "Manyo-syu", from the view of the establishment of Hiragana.
- 2005 - 2007 A described research for correlation of characters and style in Japanese history
- 2004 - 2006 Reconstruction of the theoretical and 実証的 foundation of the historical study in Japanese Language
- 2000 - 2002 A Study of Japanese Writing System in Chinese Characters and Japanese Characters, Approached from the view of "Senmyo-gaki (A Writing system for Senmyo"
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