Grandmaster (martial arts) of "Dan" rankings and Black belt and Red belt in martial arts both derive from Judo where they were adopted by its founder Kanō Jigorō. There are many terms similar or equivalent to 'grandmaster' used by various martial arts traditions. Some of these terms derive from older systems, while others are relatively modern. Japanese martial arts commonly use Sensei (先生) meaning "teacher" or literally translated, "born first" or "one who has gone before". A "Sensei" is a person who has knowledge and is willing to teach that knowledge to another. A "Sensei" assists students in "ken shiki" "the pursuit of
Japanese martial arts "heart", in context it can also mean "character" or "attitude." Character is a central concept in karate, and in keeping with the "do" nature of modern karate, there is a great emphasis on improving oneself. It is often said that the art of karate is for self-defense; not injuring one's opponent is the highest expression of the art. Some popularly repeated quotes implicating this concept include: Literally 'martial way' is the Japanese term for martial art. A code of honor for samurai way of life, in principle similar to chivalry but culturally very different. Literally "the way of the warrior",