I.K.O. TATAKAI KYOKUSHINKAIKAN Dojo Operators or Branch Chiefs from other Kyokushin organizations are always welcome to join IKO TATAKAI After Sosai Mas Oyama’s death many branches and dojos, for one reason or another, frequently find themselves to be discontent in the organization they are member of. A huge part of what is meant to be gained, and learned, from Kyokushin is the loyalty and dedication that one feels towards one’s sensei.