Chuko Chusei San'itsu Kashu Kenkyu studies lost waka collections from the classical and medieval periods through fragments, quoted texts, and surviving traces. It examines manuscript pieces and citations to reconstruct the formation and circulation of vanished anthologies.

From fragmentary waka materials, the work outlines the contours of lost poetry collections.

Saikaku in Haikai Futokoro examines the collaborative half-kasen by Ihara Saikaku and Hojo Dansui included in Haikai Futokoro. Through the linked verses themselves, it considers the relationship between Saikaku's late haikai and Genroku-period trends.

A study that rereads Genroku haikai through the linked verse of Saikaku and Dansui.