Mizawa Tamenaga

Mizawa Tamenaga, also called Tamenaka, founded the Izumo branch of the Mizawa clan. After a kinsman was granted the Mizawa manor in Nita district as jitō for service in the Jōkyū War of 1221, Tamenaga arrived there in 1302.

He grew powerful mining iron sand, running tatara furnaces and opening new fields, and in 1305 built Mizawa Castle on Mount Kamokura commanding Nita and the Shimane peninsula, then moved the family from Shinano and took the name Mizawa.