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
Kwan (martial arts) many of the schools split during this period, with some factions still practicing (even today) their original martial arts styles. Kwan (martial arts) Kwan ( 館; ) in Korean literally means building or hall, but when used in martial arts it can also refer to a school or clan of martial artists who follow the same style and/or leader. In the context of taekwondo, the phrase "the five kwans" refers to the first five martial arts schools to open in Korea following the end of Japanese occupation at the end of World War II. The phrase "the nine kwans" refers