A body of scholarship on early Japanese literature, centered on the Man’yoshu. It examines notation, place names, mythic background, and poetic conception to understand ancient language culture through specific poems.

It reads the ideas and institutions of early literature through the words and expressions of ancient waka.

Research on early modern haikai, especially Basho-style linking and haikai as communal literary practice. It considers how haikai was inherited, transformed, and theorized through both works and poetics.

Through techniques of linking born in the haikai gathering, it reads continuity and change in early modern literature.