Education
He studied shogi under Kinjiro Kimi (木見金治郎, Kinjirō Kimi).
大山康晴
He studied shogi under Kinjiro Kimi (木見金治郎, Kinjirō Kimi).
Ōyama played as professional from 1940 until his death in 1992. His students include Michio Ariyoshi, Isao Nakata and Hisashi Namekata. He was awarded as honorary citizen of Kurashiki, Okayama, his birthplace and then Hyakkoku, Aomori (now merged to Oirase, Aomori).
Ōyama had a strong interest in other kinds of boardgames, including go, mahjong, chess, chu shogi and xiangqi.
He founded Japan Xiangqi Association in 1973 and served as its president