Ryu Kumon (公紋 竜 Kūmon Ryū?) is a wandering martial artist and master of the Yama-Sen Ken, a deadly fighting style that was created by Genma Saotome. When read in the Japanese fashion the name "kumonryu" translates as "dragon of nine markings." This is a type of koi fish which comes from the karasu, or black stock, but often appears to be wearing the black coloration like a garment.