Koppou Other Names Styles Legendary Master Advanced Grand Master Grand Master Master Class Expert Class High Class Disciple Middle Class Disciple Low Class Disciple First Appearance Koppou aka Koppo is a method of fighting that specializes in the control and destruction of bone and cartilage. There are several schools of Koppo jutsu , the best known today are gikan ryu , the Hokki ryu and Koto ryu. According to Kōetsuji, the style Tsuji uses is possibly over a thousand years old and is one of the oldest Japanese styles of Kenpou and revolved around the kanji 昒, which means talent or skill to understand a clever technique in little time in contemporary Japanese and "core" in ancient Japanese. For practitioners, the difference between those who knew the "core" and th