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Blackbeard, the notorious pirate captain, is voiced by Akio Otsuka in the popular anime series One Piece. Otsuka's deep and resonant voice perfectly captures Blackbeard's menacing and charismatic personality. He brings to life the character's cunning and ambition, as well as his ruthless and unpredictable nature. Otsuka's performance has made Blackbeard one of the most memorable and iconic characters in the One Piece universe.