Black belt (martial arts) of ability when using these tactics and are sometimes referred to as McDojos or belt factories. In some Japanese schools, after obtaining a black belt the student also begins to instruct, and may be referred to as a senpai (senior student) or sensei (teacher). In others, a black belt student should not be called sensei until they are sandan (third degree black belt), or the titles kyosa or sabom in Korean martial arts as second degree or higher, as this denotes a greater degree of experience and a sensei must have this and grasp of what is involved in teaching
Japanese martial arts the most prestigious weapon. Another trend that developed throughout Japanese history was that of increasing martial specialization as society became more stratified over time. The martial arts developed or originating in Japan are extraordinarily diverse, with vast differences in training tools, methods, and philosophy across innumerable schools and styles. That said, Japanese martial arts may generally be divided into "koryū" and "gendai budō" based on whether they existed prior to or after the Meiji Restoration, respectively. Since "gendai budō" and "koryū" often share the same historical origin, one will find various types of martial arts (such as jujutsu, kenjutsu, or