"Konjaku Monogatari" (Tales of Now and Then) says that he helped the ship owner attacked by pirates off the coast of Akashi, and that he captured the pirates and got back the cargoes with his skills of Yin yang.
『今昔物語』によると、播磨国明石沖で海賊に襲われた船主を助け、陰陽の術で海賊を捕らえ、荷物を取り返したとされる。