Seko Kakukō (date of birth and death unknown) was a painter active around the middle of the Edo period. His family name is Masu, and his alias is Gonryo. He was a member of the Seko family, a temple samurai who had served Shogoin for generations. Although he is known to have a similar style to that of Soga Sobaku, his relationship to Sobaku is unknown. He appeared in the “Heian Jinroshi” from Bunka 10 to Bunsei 13.