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Yamaoroshi is one of the fifty Skillful Grade swords. It was wielded by Billy the Orca Killer, until he was defeated by Tashigi, who then claimed the sword for herself. Tashigi has not yet been shown using this sword.[1]


Yamaoroshi's capabilities are still unknown, but under Billy's usage, he boasted that he was able to chop through a killer whale with it.


  1. One Piece Novel - Loguetown arc novel, Yamaoroshi is mentioned.

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