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
Aiki (martial arts principle) the best word or phrase available to them. In this way, there may be a divergence of the meaning between arts or schools within the same art. The characters "ai" and "ki" have translations to many different English words. Historically, the principle of aiki would be primarily transmitted orally, as such teachings were often a closely guarded secret. In modern times, the description of the concept varies from the physical to vague and open-ended, or more concerned with spiritual aspects. Aiki lends its name to various Japanese martial arts most notably aikido and its parent art, Daito-ryu aiki-jujutsu. These arts