It is said that Kawakatsu subdued a (religious) group led by OFUBE no O, which enshrined "Tokonoyokami (a deity coming from an utopia of immortality or a world where the souls of the dead go)" around the Fuji River in Suruga Province in 644.
644年、駿河国富士川周辺で、大生部多（おおふべのおお）という者を中心に「常世神」を崇める集団（宗教）を、河勝が追討した、とされる。