Koichi Tohei (20 January 1920 – 19 May 2011) was a first one to be promoted to a 10 Dan by the Morihei Ueshiba ever. He taught people like Hiroshi Tada, Seigo Yamaguchi, Mitsugi Saotome, Sadateru Arikawa, Kazuo Chiba, Yoshimitsu Yamada, Steven Seagal and many others.
kashiwaya
Koichi Kashiwaya
Koichi Kashiwaya is a Koichi Tohei’s disciple, 8th Dan in Shinshin Toitsu Aikido and an Okuden in Ki Training. He was appointed as a Chief Instructor for the Ki Society USA by Tohei Sensei himself.