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
Indian martial arts general. The Vishnu Purana text describes dhanuveda as one of the traditional eighteen branches of “applied knowledge” or upaveda, along with "shastrashastra" or military science. A later term, "yuddha kalā", comes from the words "yuddha" meaning fight or combat and "kalā" meaning art or skill. The related term "śastra kalā" (lit. weapon art) usually refers specifically to armed disciplines. Another term, "yuddha-vidyā" or “combat knowledge”, refers to the skills used on the battlefield, encompassing not only actual fighting but also battle formations and strategy. Martial arts are usually learnt and practiced in the traditional akharas. "Dhanurveda", a section found in