Oyama

Oyama is a Japanese place name and surname. In geography, it most commonly refers to Oyama, a city in Tochigi Prefecture in the Kanto region of central Honshu. The name also appears in other localities across Japan, reflecting its common toponymic origin.

As a surname, Oyama is written with the kanji 大山 and is of Japanese origin. It is borne by people in Japan and in Japanese communities abroad.

Mas Oyama (1923–1994) was a prominent karate master who founded Kyokushin Karate, a full-contact martial art known for its rigorous training and sparring. The surname Oyama is also found among other figures in various fields.