In 1924 Toyama moved his family to Taiwan, where he taught in an elementary school and studied Chinese Ch'uan Fa, which included Taku, Makaitan, Rutaobai, and Ubo.

Given this diverse martial arts background, the Japanese government soon recognized Toyama's prowess, and awarded him the right to promote to any rank in any style of Okinawan karate.

In 1927, he was attacked by a swordsman belonging to a koryu school, who may have had mistaken Toyama to another Karate practitioner he had grudge with.

Toyama taught what he had learnt from Itosu and the Ch'uan Fa and did not claim to have originated a new style of karate.

Toyama had numerous Korean born people studying Karate, including Yoon Byung-in, Yun Kwae-byung, and Kim Ki-whang.

To get around the ban and continue Karate, a handful of Toyama's highest ranking students formed a dojo named Kanbukan (Hall of Korean Martial Arts) and appointed Yun Kwae-byung (who had a special status as third country person) as its director to avoid being shut-down by GHQ.

In his book "Karate Dodaihokan," Toyama talked about Shorin-ryu and Shorei-ryu, which were already well known at the time, by writing: "It is being told to the world as if this second class now exists, but there is no solid basis or evidence on historical facts.

In addition, regarding the fact that new schools were frequently born at that time, "Recently, there are some unknown karateka who have introduced a strange new name.

The '*' symbol indicates persons and organizations that did not train directly with Toyama, but were confirmed as members with the responsibilities of the shihan title and high degree rank.

Other students awarded shihan and hanshi title license and high degree rank but not referenced in Karate-Do Tai Hokan.