Kanbukan dojo was established in 1945 at Kudan (Chiyoda, Tokyo) by the high-ranking students of Shudokan under Kanken Toyama to practice and popularize karate while avoiding GHQ surveillance under the postwar martial arts ban.
In 1951, after the regulations by GHQ were relaxed, Norio Nakamura changed the name to Renbukan (錬武舘) at the Wenkai Society in Higashi, Shibuya.
[4] Kanbukan Dojo chiefly taught Karate, but also had open exchange between different martial arts and welcomed practitioners of both Japanese and Korean ethnicity.
Renbukan, which was founded by Nakamura, a high-ranking student of Kanbukan, still exists, has left the Renbukai, and is a member of the All Japan Koshiki Karatedo Federation (Chiba faction).
Asides from being a pioneer in the competitive kumite and being the predecessor of JKF Renbukai, there were people who would later become important figures in the karate world, such as Mas Oyama, who were a disciples at Kanbukan.
Promoting bogutsuki karate with Yun Kwae-byung involved, Kanbukan has likely influenced Taekwondo's (particularly Kukkiwon's) practice of "hogu daeryon" (“sparring with protective armor”).
[9] In addition, the "Karate Directory" (空手道名鑑 “Karatemichi meikan," ASIN B000J8AOK4) was published by Dr. Yoon Kwei-Byung when he was the director of Kanbukan.