Tsutomu Ohshima

is a prominent Japanese master of Shotokan karate who founded the Shotokan Karate of America (SKA) organization. He is the Shihan (Chief Instructor) of the SKA, and to this day holds the rank of 5th dan in karate, which was awarded to him by Gichin Funakoshi. In 1957, he established the Caltech Karate Club—the first university karate club in the United States of America.