Oyama Sadatomo

Oyama Sadatomo (1282–1330) was a late Kamakura commander and shogunal gokenin, seventh head of the powerful Oyama clan of Shimotsuke and lord of Oyama Castle. He received the character sada in his name from the regent Hōjō Sadatoki.

In 1323 he donated a hundred kanmon in cash at the thirteenth-anniversary memorial for Sadatoki. The Jōraku-ki records that he died in 1330 aged forty-nine, and his son Hidetomo succeeded him.