He attained his manhood in 1257 and took the name of Tokimune, one character of his name was taken from that of the Imperial Prince Munetaka, who was seitaishogun (literally, "great general who subdues the barbarians").
康元2年（1257年）元服し、征夷大将軍宗尊親王の偏諱を賜り時宗を名乗る。