Tōyama

The Tōyama were a warrior family of eastern Mino, named for Tōyama estate in Ena district. Tōyama Kagetomo inherited the estate from Katō Kagekado and built Iwamura Castle, the seat of the senior branch.

In the late sixteenth century the struggle between the Oda and Takeda destroyed the Iwamura branch and several others. Branches serving the Tokugawa fought for the eastern army at Sekigahara in 1600; Tōyama Tomomasa became lord of the Naegi domain under the Edo shogunate.