Mas Oyama, South Korean-Japanese martial artist (died 1994)

Mas Oyama

Founder of Kyokushin Karate (1923–1994)

Masutatsu Ōyama, commonly known outside Japan as Mas Oyama, was a Korean-Japanese karateka. He was the founder of Kyokushin Karate, considered the first and most influential style of full contact karate.