Katana is a Ha'tak spaceship home and base of operations of Raiden and the flagship of his Ha'tak fleet that constantly roam from world to world in its domain. Use of a mobile base of operations has made him a difficult target and benefits that more than compensates. Katana also carries Stargate which was once the Kyoto board, it can be used for outbound trips when the ship is in orbit of a planet with a Stargate own, but can only accessed from other Stargate when Katana revolves around Kyoto. (RPG: "Fantastic Frontiers: Stargate Season One")