Kyokushin kaikan (極真会館?) is a style of stand-up, full contact karate, founded in 1964 by Korean-Japanese karate master, Masutatsu Oyama (大山倍達, Ōyama Masutatsu?) who was born under the name Choi Young-Eui. 최영의}. Kyokushinkai is Japanese for "the society of the ultimate truth". Kyokushin is rooted in a philosophy of self-improvement, discipline and hard training. Its full contact style has had international appeal (practitioners have over the last 40+ years numbered more than 12 million).
Read more about Kyokushin Kaikan: History, Dojo Kun (Training Hall Oath), The Kanji and Its Meaning in Kyokushin, Techniques and Training, Influence, Notable Practitioners