Creator: Akio Ohtsuka
Snake: Colonel, I need you to describe my seiyuu here for me.
Colonel: You want to know about David Hayter, huh, Snake?
Snake: Huh? No!!!
Colonel: Well, then Kiefer Sutherland?
Snake: NO, Kiefer voices my father, Big Boss. Not my English voice actor, Colonel, but my seiyuu, the Japanese equivalent of a voice actor.
Colonel: Oh, right. My mistake. Akio Ohtsuka is one of the most respected seiyuu veterans in the business. He's the son of another veteran seiyuu, Chikao Ohtsuka, making him an old son. Until a few years ago, he was also married to another seiyuu, Yoko Soumi, known for her Vamp, serious lady or Femme Fatale roles (like Karen Kasumi from X1999 the TV series, Atsuko from YuYu Hakusho).
Snake: So he's part of seiyuu royalty, eh? I wouldn't be surprised if his kids became seiyuus as well.
Colonel: Known for a deep, gruff voice that fits him into veteran-like roles, Akio often lands characters who are widely considered Badass, making him quite a fan favorite amongst older seiyuus. He'll gladly do humor roles, as well.
Snake: Going from serious to humorous, eh? Wouldn't it be best to stick to one role?
- "Ansem"/Xehanort in Kingdom Hearts
- Anavel Gato in Mobile Suit Gundam 0083: Stardust Memory, Super Robot Wars F, Super Robot Wars Alpha 1 and 2, Super Robot Wars Impact and Super Robot Wars Advance Portable
- Batou in the Ghost in the Shell franchise
- Benkei in Genji
- Dr. Black Jack in Black Jack
- Blackbeard in One Piece
- The eponymous vampire hunter Blade
- Bluebeard in Marchen, as well as the narration in some of Sound Horizon's concerts.
- Bobby in the Japanese dub of Animaniacs
- Boss in 12Riven
- Boy in Yarudora series vol.3: Sampaguita
- Daigo Kazama in Project Justice, replacing Koichi Yamadera
- Vice-Foreign Minister Darlian and the Narrator in Mobile Suit Gundam Wing
- Dub voice for:
- Elmer Snell in Mobile Suit Gundam MSIGLOO 2: The Gravity Front
- Judge Gabranth in Final Fantasy XII and Dissidia: Final Fantasy
- Gaius van Baelsar in Final Fantasy XIV
- Gio in Atelier Rorona and Meruru
- Gwendal von Voltaire in Kyo Kara Maoh
- Han Solo (Harrison Ford) in the Japanese dub of Star Wars
- Director Higashio in Majin Bone
- Hyo Amano in The Last Blade
- Iron Will in the Japanese dub of My Little Pony: Friendship Is Magic
- Jules Winfield (Samuel L. Jackson) in the Japanese dub of Pulp Fiction
- Kyoraku Shunsui in the Bleach franchise
- Laike in Lunar: Silver Star Story
- Leo Johnson (Eric DaRe) in the Japanese dub of Twin Peaks
- Mario Auditore in Assassins Creed II
- Mihai in the Dogs: Stray Dogs Howling in the Dark OVA
- Minamoto no Yoritomo and Unknown Soldier P1 in Namco X Capcom
- Morrison in Devil May Cry: The Animated Series
- Radi Yaeger in Valkyria Chronicles
- Regal Bryant in Tales of Symphonia
- Rider (Alexander the Great) in Fate/Zero
- Seth in Street Fighter IV and Project X Zone
- Shingen Kishitani in Durarara!!
- Siam in Canaan
- Solid Snake, Solidus Snake, and Naked Snake/Big Boss in Metal Gear.
- Souichi "Ironman" Nishimura in Baka to Test to Shoukanjuu
- Souther/Thouzer in Fist of the North Star (Movie version; succeeds Banjō Ginga, who is ironically Liquid Snake)
- Tadakutsu Honda in the Samurai Warriors franchise
- Wamuu in JoJo's Bizarre Adventure
- Windam in Magic Knight Rayearth
- Captain William Rush from Time Crisis 4