Katana is a fictional character, a superheroine that appears in comic books published by DC Comics. She first appeared in a special insert in The Brave and the Bold #200 (July 1983), and was created to be a member of the first Outsiders team by writer Mike W. Barr and artist Jim Aparo. Tatsu Yamashiro was an average Japanese girl, save for her proficiency in the martial arts, a trait encouraged by her parents. Two brothers — Maseo and Takeo Yamashiro — both proclaimed their love for her. While she liked both, she chose Maseo. Takeo, "did not take this well," and refused to attend the couple's wedding. Unmissed — indeed, Maseo (his only family) disowned his brother, who had joined the Yakuza, taking their mark of a large dragon tattoo across his chest — Tatsu and Maseo, mourning the deaths of Tatsu's parents (cause unknown), started a family of their own. Tatsu gave birth to twins, Yuki and Reiko, while Takeo rose in rank of the Yakuza, indulging his "exotic tastes" for ancient weapons. He was presented with a pair of matching swords by General Karnz (later henchman to Baron Bedlam), one of which Takeo favored for its mystical properties.
Takeo spent days preparing himself, before taking both swords to the Yamashiro residence, demanding his brother duel for the "prize" of Tatsu. During the course of the struggle, a fire was started, and — while Maseo was distracted by his children — Takeo killed his brother with the sword which would become known as "Soultaker". Tatsu arose just in time to see her husband die, and engaged Takeo, gaining the upper hand and disarming him. Attempting to save her children, she heard her husband's voice coming from the sword telling her they were already lost. Escaping with her life, Tatsu began training as a samurai under a master called Tadashi. After much time she graduated from his tutorship and left for America where she intended to use her talents to fight for justice. She took the codename Katana after the sword that she wielded, possessed for some time by the soul of her husband