Grandmaster Ashihara said that he resigned from kyokushin but according to kyokushin he was expel just like Grandmaster Tadashi Nakamura (Nakamura is the founder and Chairman of the World Seido Karate Organisation) Hideyuki Ashihara(1944 - 1995) was one of Oyama's top students. most of oyama student left kyokushin and setup their own school e.g. Shido-Kan, Sato-Juku, Seido-juku, seido-kaikan, Ashihara-Kaikan, Enshin-Kaikan, Daito-juku...etc