Wikipedia
Bokuyōkan
, a school of Daitō-ryū Aiki-jūjutsu, is a Japanese martial art founded by Katsumi Yonezawa (1937–1998). This school descends from the school of jujutsu founded by Takeda Sokaku. One of Sokaku's senior students, Horikawa Kodo (1894–1980), founded the Kōdōkai school of Daitō-ryū in 1950 in Kitami, Hokkaidō. After receiving a 7th dan grading through the Kōdōkai and acting as one of the organization's senior teachers, Katsumi Yonezawa founded his own organization, the Bokuyōkan. This organization is currently headed by his son, Hiromitsu Yonezawa.