Since his mother was from Kyoto, he went to Kyoto as an envoy when MINAMOTO no Sanetomo, the third shogun, welcomed the daughter of Nobukiyo BOMON, a noble in Kyoto, as his lawful wife.
母が京の出身と言うこともあり、3代将軍源実朝が都の貴族である坊門信清の娘を正室に迎える際の使者として上洛した。