Mugen, a word of Japanese origin meaning "infinite", may refer to: "Mugen" (Nana Mizuki song), 2009 "Mugen" (Porno Graffitti song), 2002 M.U.G.E.N, a freeware 2D fighting game engine Mugen Motorsports, a Japanese automotive company Mugen Seiki, a Japanese manufacturer of radio-controlled cars Mugen (town), in Guiping, Guangxi, China Mugen, a character in the Japanese anime series Samurai Champloo Mugen, a realm or plane of existence that contains an infinite space