Oyama Hidetomo

Oyama Hidetomo (?–1335), first named Takatomo, was a late Kamakura commander, eighth head of the Shimotsuke Oyama clan and lord of Oyama Castle. He first served the Hōjō, fighting at the 1331 sieges of Kasagi and Shimo-Akasaka in the Genkō War.

In 1333 he defected to Nitta Yoshisada and helped overthrow the Kamakura shogunate, after which Emperor Go-Daigo made him governor of Shimotsuke. In 1335 he met Hōjō Tokiyuki's Nakasendai Rebellion at Fuchū in Musashi and was killed in the defeat.