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
Grandmaster (martial arts) knowledge". Some organizations, such as the Bujinkan, Kodokan (Judo), and Shodokan Aikido, use the term shihan for high-ranking or highly distinguished instructors. , meaning "the head family [house]," is sometimes used to refer to "founder of a style" because many modern sōke are the first generation headmasters of their art, but most correctly refers to the current head. A sōke is considered the ultimate authority within their art and has the authority to issue a "menkyo kaiden" certificate indicating that someone has mastered all aspects of the style. The actual Korean word for a student's master is sonsaeng. This term