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 ancient Korean martial arts, as well as martial arts from other nations. Although the name "Tang Soo Do" had been used before by the likes of Master Wong Kuk Lee, it is Hwang Kee who is usually credited as the creator of what is today known as Tang Soo Do, or Moo Duk Kwan Tang Soo Do, the school from which all others come from. Hwang Kee witnessed as a child how a man defended himself from several assailants using kicking techniques, he most likely was using Taekkyon. He followed this man home and watched him train from a distance.