Akio Ōtsuka (大塚 明夫, Ōtsuka Akio) (born November 24, 1959) is a Japanese actor and seiyū from the Tokyo Metropolitan area. He is currently attached to Mausu Promotion. He stands at 182 centimeters (6 feet), weighs 73 kilograms (about 161 lbs.) and has a blood type of B. He married fellow seiyū Yōko Sōmi on February 11, 2005, but later divorced her in 2009. He is the son of seiyū Chikao Ōtsuka.
The astringent and calm quality of his voice has landed him many roles in films, dubbing, animation, and video games. He is most known for the roles of Black Jack (Black Jack), Solid Snake (Metal Gear Solid), Xehanort (Kingdom Hearts), Shunsui Kyouraku (Bleach), Lieutenant Garuru (Sgt. Frog), Gwendal von Voltaire (Kyo Kara Maoh!), Batou (Ghost in the Shell) series and movies, Blackbeard (One Piece), Twin brother police Inspector's Sango and Jugo Yokomizo (Detective Conan), and Anavel Gato (Mobile Suit Gundam 0083: Stardust Memory). Apart from voicing villainous or jokester characters, he also occasionally does narration for anime shows.