Issei Tsubaki

Issei Tsubaki (椿 一成 Tsubaki Issei) only appears in. He is the president of the karate club at Jindai High and Sousuke Sagara's rival who is a skilled martial artist, but he requires thick glasses because of his short-sightedness.

Etymology

 * The name Issei means "one" (一) (is) and "become" (成) (sei).
 * Issei's surname Tsubaki means "camellia flower" (椿).

Trivia

 * Issei is sometimes accompanied by three identical karatekas, all black belts.