On October 17, 1182, Moritsuna became one of palanquin bearers when MINAMOTO no Yoriie, Yoritomo's legitimate son, moved from ubuya (a hut for delivering babies) to a residence on the palanquin.
10月17日、頼朝の嫡子である源頼家が産所から邸宅に入る際の輿を担いでいる。