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 is of prime importance not only in karate but in all modern martial arts. For the purpose in modern martial arts, let us understand "rei" as the ceremonial bow in which courtesy and decorum are manifest. He who would follow the way of karate must be courteous, not only in training but in daily life. While humble and gentle, he should never be servile. His performance of the kata should reflect boldness and confidence. This seemingly paradoxical combination of boldness and gentleness leads ultimately to harmony. It is true, as Master Funakoshi used to say, that the spirit of karate