Unkoku Tohaku (1674-?) (1674-?) was a painter active in the mid-Edo period. He is the fifth generation of the Ungaya school and the eldest son of the fourth generation head of the school, Ungaya Tohaku. His childhood name was Chiyoju, and his alias was Ezan. In 1691, he was appointed Hohashi, and in 1709, he succeeded to the governorship of the school upon the retirement of Tokan.
