This paper is a study of the effect of W. B. Yeats's contact with Japanese Noh drama on his work. The immediately discernible effect on his work can be seen, of course, in his adaptation of Noh dramatic form to his Four Plays for Dancers and The Death of Cuchulain. It is the thesis of this paper, then, that, despite many handicaps, Yeats's aesthetic background was not only sufficient to discover what suggestion did lie in the limited information available to him concerning Noh, but also sufficient for him to intuit much of what wasn't suggested.