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
Japanese martial arts with self-defense as a secondary purpose. Additionally, many of the "gendai budō" have included a sporting element to them. Judo and kendo are both examples of this. , literally meaning "gentle way" or "way of softness", is a grappling-based martial art, practiced primarily as a sport. It contains substantially the same emphasis on the personal, spiritual, and physical self-improvement of its practitioners as can be found throughout "gendai budō". Judo was created by Kano Jigoro (嘉納 治五郎 "Kanō Jigorō", 1860–1938) at the end of the 19th century. Kano took the "koryū" martial arts he learned (specifically Kitō-ryū and Tenjin Shin'yo-ryū