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
Elderly martial arts master who would misbehave with him sometime in the course of the movie. He always tries to verbally prevent mischief makers or the rival martial artist (who is often young and arrogant and sees the martial arts only as a means to act tough and bully people) for as long as he can, and that too politely. Only when he is forced to use his skills and left with no option, he shows how the mischief makers are no match for him—thereby demonstrating how politeness should not be mistaken for weakness. These are shown, for example, by Iroh in the "",