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 martial artist brother, or friend, maimed for life (or even killed) by the formidable and vicious fighter, seeks the master out himself with a resolution to take revenge. In such cases, the master is often unwilling at first, and may appear to be so just to test the seriousness and commitment of the protégé. But finally after a few days, he agrees to start training, after he feels the protégé has passed his test. The training imparted is typically harsh and rigorous right from day-one, and the master does not care if the hero has bruised and bloodied himself all