However, jujutsu is a martial art with no (or a small) weapon, as Jigoro KANO defined, and this definition describes the minimum common factor of all jujutsu-related martial arts.
しかし、柔術には嘉納治五郎が柔術を『徒手もしくは小型の武器を持つ武術』と定義したように、その程度しか共通理念はない。