Chidōkan refers to four different Han schools in Edo period Japan. Chidōkan (Tsuruoka), the school of the Shōnai Domain Chidōkan (Tosa), the school of the Tosa Domain Chidōkan (Hiji), the school of the Hiji Domain Chidōkan (Ōgaki), the school of the Ōgaki Domain Domains of Japan