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1) According to legend, the apprentice of the sword-smithing master, Masamune

2) A sword forged by Muramasa. Sometimes thought to be cursed or violent.

3) A sword used in RPGs, usually more violent/vengeful and inferior to the Masamune.
I used the Muramasa until I finally got the Masamune.
by AllUltima February 20, 2005