Tanigawa Sensei's deeper understanding of Goju which he refers to as Inyo. The techniques (waza) of Inyo Karate Do contain both hard method techniques (Go ho waza) and soft method techniques (Ju ho waza). This correct blend of techniques comes from the Japanese interpretation of the Chinese ‘Yin Yang’ philosophy, these dual qualities are known as ‘In’ and ‘Yo’ respectively. ‘Inyodo’, meaning ‘The Way of Yin and Yang’. The inyo symbol has a large circle (Yo) that represents the universe. Within this and connecting with it at just one point, there is a smaller circle (In). The larger area is usually white, the smaller circle is red. When red, it reflects the image of the sun disc on the Japanese flag and the white crescent is seen as representative of the moon.
Nihon Goju Ryu Karate Do is a Bubishi linage school, founded by Tanigawa Takeshi Sensei 9th Dan and is his understanding following many years of study at the Senbukan dojo in Kawasaki, Japan, under Izumikawa Kanki Sensei. Its full name is Tanigawa Ha Inyo Karate Do, this style of Karate is not a sport but is a traditional Martial Art. The Bubishi is considered to be the bible of Karate. Ninbukan is connected to the Bubishi Kenkyu Kai which is a study association dedicated to the teachings of the Bubishi.