Sosai Masutatsu Oyama (1923-1994) founded the Oyama Dojo in Tokyo Japan in 1953.  Synthesizing his martial arts knowledge and training into a unique hard-hitting style,  it was officially named Kyokushin (Ultimate Truth) in 1957.  Mas Oyama would go on to spread Kyokushin around the world and established the International Karate Organization (IKO) in 1964.  In 1969 Mas Oyama held the first All-Japan Full Contact Karate Open Championships and would continue to hold it annually as well as held the first World Full Contact Karate Open Championships in 1975 and would hold it every 4 years.

 

After the death of Master Oyama’s death in April 1994, Kyokushin has continued to spread around the world.

​

SOURCE: http://emadojola.com/history-of-karate-shin-kyokushin/