After learning iaijutsu and other techniques to combat firearms, Mitsurugi sought a sword appropriate for a new style of fighting. He finally settled on Shishi-Oh (獅子王, lit. "Lion King"). An incredibly well-balanced Japanese sword, it is Mitsurugi's preferred weapon. During the intense training that he followed after his defeat in front of his lord, Mitsurugi became dissatisfied with his old katana Korefuji and replaced it with Shishi-Oh, a katana with a wider blade. With this blade Mitsurugi perfected many new sword fighting moves to defeat the rifle.