His main area of research lies in the study of grammatical structure based on the examination of conversation data in which he and his collaborators have published widely. He is currently engaged in two large-scale projects with researchers both in Japan and the U.S.: a corpus of everyday spoken Japanese and a documentation of the Ikema dialect of Miyako, an endangered language spoken on remote Japanese islands near Taiwan. E-mail:tsuyoshi.ono@ualberta.ca