I did Korean Karate. Which was just stolen Japanese Karate. Which was just stolen Okinawan Karate. Etc.
Oyama real name was Choi. He was a South Korean. NOT Japanese. His style of Karate was just Tae Kwon Do and Tang Soo Do from Korea, mixed with Shotokan Karate from Japan. He later did Judo and Goju Ryu. He put them all together and called it his own Karate style. Translated, Kyoku means ultimate, Shin means truth or reality, and Kai means to join or associate. Kan means house. This is the name he finally settled on.
Kyokushin kaikan