He was on intimate terms with the Kamakura bakufu (Japanese feudal government headed by a shogun), as evidenced by his marriage to Masako, daughter of MINAMOTO no Yoritomo's younger sister's husband, Yoshiyasu ICHIJO, and after the third Shogun, MINAMOTO no Sanetomo--who was also Yoritomo's own child--was assassinated, Kintsune's grandchild by his daughter, FUJIWARA no Yoritsune, was made Shogunal successor.
源頼朝の妹の夫一条能保の娘全子を妻としていることから、鎌倉幕府と親しく、頼朝の子で3代将軍源実朝が暗殺された後、外孫にあたる藤原頼経を将軍後継者とした。