Masamune

Masamune was a master swordsmith of ancient Japan.

Scooby-Doo! And The Samurai Sword
According to legend, Masamune was hired to create a sword of great magical power by a ronin. He was able to do this in one year, but his evil apprentice Muramasa secretly offered to make one in six months. By the time Masumune completed his work, the ronin had accepted the cursed sword, the Sword of Doom, and become the Black Samurai. Masamune turned his sword, the Sword of Fate over to the Green Dragon, who used it to defeat the Black Samurai.

Appearances

 * Scooby-Doo! And The Samurai Sword