In October 1185, when the memorial service of Yoritomo's father, MINAMOTO no Yoshitomo, was held at Shochoju-in Temple, only three persons, Yoshinobu, Koreyoshi and MINAMOTO no Yoritaka, were allowed to come closer to Yoshitomo's remains.
文治元年（1185年）9月に勝長寿院で頼朝の父源義朝の供養が行われた際、義信と惟義、源頼隆の3名のみが遺骨への近侍を許されている。