Sato Hideaki Sensei is one of the closest students of Chiba Tsugutaka Shihan and he is the head instructor of the Wakimachi Dojo Shikoku Hombu were Olivier Gaurin and myself train every month. Sato Sensei came to Tokyo last April to give a 3-hours seminars and introduce the Tokyo practitioners to the specifics of the Daito-ryu of Shikoku.