Mōri Suemitsu
Mōri Suemitsu (1202–1247), fourth son of Ōe no Hiromoto, took the name Mōri from his Sagami estate, founding the Mōri clan. A Kamakura gokenin, he served Shōgun Minamoto no Sanetomo and in the Jōkyū War of 1221 fought under Hōjō Yasutoki, winning jitō posts at Yoshida manor in Aki and Sahashi in Echigo.
In the 1247 Hōji War he sided with his wife's Miura kin, was beaten by Hōjō Tokiyori, and killed himself at Kamakura's Hokkedō with his sons; only Tsunemitsu's line survived.