The number of plays that he wrote is uncertain, and is estimated to be around 50 or 60.[13] His intellectual interests were eclectic[2] and he was a proficient writer of Renga.[14] The Tale of the Heike was the source of several of his best known plays.[15] He integrated Japanese and Chinese ancient poetry into his drama.[16] Contemporary dramatists Doami and Zoami had a significant influence on him,[6] earning recognition in his treatises.