What is 'Zen Master Raven' in Japanese?
This is a term for Japanese martial arts. Zen ken without the hyphen refers to exercises for Japanese Swordsmanship or iaido practice. See also Zen Nippon Kendo Renmei Iaido. The word Zen is for Zen Buddhism and "Ken" is "fist" (for karate) or "sword"(for iaido). See also the philosophy of Ken Zen Ichi, where fist/sword and the zen, meditative aspect of the movement, or the fight, become one (= ichi).