After the Minamoto family came to an end with the death of the third shogun, Sanetomo MINAMOTO, the Kamakura shogunate was presided over by a sekke shogun (shogun from a regent family) sent from the Imperial Court, which made the position of shogun a merely ceremonial post.
3代将軍源実朝の死による源家の断絶後、鎌倉幕府は朝廷から迎える摂家将軍を推戴し、将軍の地位を形式的なものにした。