Muichimonji (無一文字, lit. "Nothingness") is Mitsurugi's new primary weapon in Soulcalibur V. It replaces Shishi-Oh, which Mitsurugi lost in a fateful duel with a Battōjyutsu swordswoman 17 years ago, but managed to gain victory by punching her stomach. After he returned home to Bizen, Mitsurugi encountered a rather pathetic katana set behind a tag identifying it as 'Ichimonji'. While no respectable blacksmith would ever admit to creating such a weapon, Mitsurugi had come to the realization that the strength of one's weapon is just for show. A warrior's true strength comes from within.