Minami Juuji System (ミナミジュウジ座系 Minamijuuji-za-kei), composed of four individual solar systems including Gacrux and Acrux, is a cross-shaped constellation system, the center of which contains the planet Southern Cross, on which Don Armage, shogun of the Space Shogunate Jark Matter, is based. Space.36: The Legend That Sleeps in Lucky's Homeworld