He was a student of Tatsuo Shimabuku in Okinawa...This was in the early fifties when he was stationed in Okinawa after serving in Korea...He was a Marine at Chosen Reservoir...
The man is a hero ... Oyate and Mitose brought Ok8nawan Karate to Hawaii ... later to the USA. I teach Ryukyu along with Kyusho and Small Circle Jujitsu ... I love Issin ryu ... which of course is a close cousin of Ryukyu and Shorin ryu ... the katas are more in Ryukyu are more kehon than that of Issen ryu ... but I like the flair of Issen ryu better