Mogami

The Mogami were a branch of the Shiba who ruled from Yamagata in Dewa. Shiba Kaneyori went to the Yamagata basin in 1356, built a castle there around 1360 and took the name Mogami.

Mogami Yoshiaki expanded the family's lands and in 1600 defended them against the Uesugi while supporting Tokugawa Ieyasu. Ieyasu rewarded him with a large domain, but in 1622 the shogunate confiscated it after a dispute within the family.