Akio Otsuka (大塚 明夫, Ōtsuka Akio, born November 24, 1959) is a Japanese actor, voice actor and narrator from the Tokyo Metropolitan area. He is attached to Mausu Promotion.

The astringent and calm quality of his deep voice has landed him many roles in films, dubbing, animation, and video games. He is most known for the roles of second generation Jigen Daisuke (Lupin III franchise), Black Jack (Black Jack), Solid Snake, Naked Snake, Solidus Snake and Venom Snake (Metal Gear games), Gamigami Devil (Popolocrois), Ryoma Hoshi (Danganronpa V3: Killing Harmony), Shunsui Kyouraku (Bleach), Lieutenant Garuru (Sgt. Frog), Gwendel von Voltaire (Kyo Kara Maoh!), Batou (Ghost in the Shell series and movies), Blackbeard/Marshall D. Teach (One Piece), Tadakatsu Honda (Samurai Warriors and Warriors Orochi series), twin police inspectors Sango and Jugo Yokomizo (Detective Conan), Bryan Hawk (Hajime no Ippo), All For One (My Hero Academia), Thorkell (Vinland Saga), Wamuu (JoJo's Bizarre Adventure), Anavel Gato (Mobile Suit Gundam 0083: Stardust Memory) and the various incarnations of Xehanort (Kingdom Hearts series). Apart from voicing villainous or jokester characters, he also occasionally does narration for anime shows. He is the son of the late voice actor Chikao Ohtsuka.

He is also the famous official dubbing roles for many western actors such as Steven Seagal, Nicolas Cage, Antonio Banderas, Dolph Lundgren, Samuel L. Jackson, Denzel Washington, Dennis Quaid and many more.

On January 7, 2017, he was married, according to Mausu Promotion.