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
Korean martial arts to a portrait of the founder and/or to national flags). Many modern Korean martial arts also make use of colored belts to denote rank, tests to increase in rank, and the use of Korean titles when denoting the teacher. These include: NOTE: remove the word "nim" for the actual titles as "nim" is an honorific meaning "sir" or its equivalent. These Korean terms are based on Confucian rank systems (with the same Chinese characters). Many schools also make use of Korean terminology and numbers during practice, even if located outside [South] Korea. Korean martial arts are usually practiced in a