Masutatsu Oyama

Masutatsu Ōyama (Ōyama Masutatsu, born Choi Yeong-eui, more commonly known as Mas Oyama, was a karate master who founded Kyokushin Karate, considered the first and most influential style of full contact karate. A Zainichi Korean, he spent most of his life living in Japan and acquired Japanese citizenship in 1968.