Season 1 Ring ni Kakero 1 TV Asahi , 2004 Watch now Season 2 Ring ni Kakero 1: Nichibei Kessen-hen TV Asahi , 2006 Watch now Season 3 Ring ni Kakero 1: Shadow TV Asahi , 2010 Watch now Season 4 Ring ni Kakero 1: Sekai Taikai Hen TV Asahi , 2011 Watch now