Ken'yū Horiuchi é um seiyū (dublador) veterano. Em 2002 ele fundou o seu próprio escritório de gestão, Kenyu-Office.

Trabalhos notáveis:
- Animes
After War Gundam X (Jamil Neate)
Angelique (Oscar)
Bleach (Syūsuke Amagai)
B'tX (Metalface)
Captain Tsubasa (Taki, Pierre)
Cowboy Bebop (Gren)
Gun X Sword (The Claw Man)
Hataraki Man (Narita)
Kaze no Stigma (Burnhart Rhodes)
Konjiki no Gash Bell! (Kieth)
Kyatto Ninden Teyandee (the narrator)
Kyo Kara Maoh! (Dan Hiri Weller)
Mahoraba (Yukio Haibara (Johnny))
Mister Ajikko (Chef Shimonaka)
Monster Rancher (anime) (Durahan)
Nadia: The Secret of Blue Water (Sanson)
Naruto (Segundo Hokage)
Naruto Shippuden (Pain)
Petite Princess Yucie (Gunbard)
Telepathy Shōjo Ran (Ronpei Isozaki)
Transformers 2010 (Springer)
Ultraman Story (Ultraman)
Yakitate!! Japan (Brad Kidd)
Tekkaman Blade (Balzac Asimov)
Rape Man (Rape Man)
s-CRY-ed (Unkei)

- OVAs
B'tX Neo (Metalface)
Bubblegum Crisis (Daley)
Eternal Filena (Nesuto)
RG Veda (Bishamon-ten)

- Filmes de anime
One Piece: Nejimaki Shima no Bouken (Borodo)

- Jogos eletrônicos
Ayakashi Ninden Kunoichiban (Johnny Tono)
Dissidia: Final Fantasy (Emperor)
Mana Khemia: Alchemists of Al-Revis (Gunnar Damm)
Mana Khemia 2: Ochita Gakuen to Renkinjutsushi Tachi (Gunnar Damm)
Metal Gear Solid 2: Sons of Liberty (Raiden)
Metal Gear Solid 3: Snake Eater (Major Ivan Raidenovitch Raikov)
Metal Gear Solid 4: Guns of the Patriots (Raiden)
Super Robot Wars (Irmgard Kazahara, Duke Freed, Jamil Neate)
Tales of Rebirth (Geyorkias)