Seizō Katō (加藤 精三) was a Japanese voice actor.
| Movie | Detective Conan: Love Story at Police Headquarters ~Wedding Eve~ | Kiyonaga Matsumoto (voice) | 2022-05-13 |
| Movie | OOO, Den-O, All Riders: Let's Go Kamen Riders | General Jark (voice) | 2011-04-01 |
| Movie | Five Numbers! | Rōjin (voice) | 2011-04-07 |
| Movie | Detective Conan: The Raven Chaser | Kiyonaga Matsumoto (voice) | 2009-04-18 |
| Series | Ultraman Mebius Side Story: Ghost Rebirth | Armored Mefilas (voice) | 2009-11-25 |
| Movie | Kamen Rider Decade: All Riders vs. Dai-Shocker | General Jark (voice) | 2009-08-08 |
| Movie | Ultraman Mebius Side Story: Ghost Rebirth - STAGE II: The Emperor's Resurrection | Armored Mefilas (voice) | 2009-12-22 |
| Movie | Ultraman Mebius Side Story: Ghost Rebirth - STAGE I: The Graveyard of Darkness | Armored Mefilas (voice) | 2009-11-25 |
| Movie | Neko Ramen Taisho | Taisho (Jefferson III)(voice) | 2008-11-29 |
| Movie | Dororo | Hell Hound | 2007-03-15 |
| Series | Shigurui: Death Frenzy | Kogan Iwamoto | 2007-07-19 |
| Series | Elemental Gelade | Kinnbart (voice) | 2005-04-05 |
| Series | The Gokusen | 2004-01-06 | |
| Movie | Kamen Rider 555: Paradise Lost | Wirepuller of Smart Brain | 2003-08-16 |
| Series | Ninja Scroll: The Series | Yamidoro Anden (voice) | 2003-04-14 |
| Movie | Tokyo Godfathers | Kaa-san (voice) | 2003-12-05 |
| Series | Muteki Ou Tri-Zenon | 2000-10-14 | |
| Movie | Seijuu Sentai Gingaman vs Megaranger | Gregory (voice) | 1999-03-12 |
| Movie | Denji Sentai Megaranger vs Carranger | Helmedor | 1998-03-12 |
| Series | In the Beginning: The Bible Stories | Abraham | 1997-04-01 |
| Movie | Slayers Great | Galia Einburg (voice) | 1997-08-02 |
| Movie | Bakumatsu no Spasibo | Adm. Yevfimiy Putyatin (voice) | 1997-09-20 |
| Movie | Twilight of the Dark Master | Takamiya, male form (voice) | 1997-11-11 |
| Series | Fire Emblem | Jagen (voice) | 1996-01-26 |
| Movie | Crayon Shin-chan: Unkokusai's Ambition | Unkokusai | 1995-04-05 |
| Movie | Gin Rei's Blue Eyes | Schwartz (voice) | 1995-02-21 |
| Movie | Tokyo Revelation | Priest (voice) | 1995-04-21 |
| Movie | Princess Minerva | Hagan (voice) | 1995-05-01 |
| Series | Hyper Doll | Dr. Zaiclit (voice) | 1995-10-05 |
| Series | Ruin Explorers Fam & Ihrie | Elder Teacher (voice) | 1995-06-25 |
| Movie | Gunsmith Cats | Senator Edward Haintz (voice) | 1995-11-01 |
| Movie | Crayon Shin-chan: The Hidden Treasure of the Buri Buri Kingdom | BuriBuri Majin (voice) | 1994-04-23 |
| Movie | Genocyber | Kenesu (voice) | 1994-03-02 |
| Series | Maps | Lingrade (voice) | 1994-07-08 |
| Movie | Tottoi | Nanni Span (voice) | 1992-01-01 |
| Movie | Crying Freeman 5: Abduction in Chinatown | Larry Buck (voice) | 1992-10-01 |
| Movie | TV Program That Even Monkeys Can Shoot | Kato Shuzo | 1992-02-04 |
| Movie | Appleland Story | General Nolbelt (voice) | 1992-12-11 |
| Movie | Download: Devil's Circuit | Echigoya (voice) | 1992-12-18 |
| Series | Super Rescue Solbrain | SolDozer (voice) | 1991-01-20 |
| Movie | Far East of Eden: Ziria's Dreamlike Chapter | 1990-07-27 | |
| Movie | Rhea Gall Force | Nelson (voice) | 1989-03-20 |
| Series | Ronin Warriors: Gaiden | Shikaisen | 1989-04-30 |
| Movie | Gall Force: Earth Chapter | Nelson (voice) | 1989-12-25 |
| Movie | The Guyver: Bio-Booster Armor | Dr. Hamilcar Barcas (voice) | 1989-09-25 |
| Series | Oishinbo | Kyōichi Koizumi | 1988-10-17 |
| Movie | Hikari Sentai Maskman: The Movie | Earth Emperor Zeba (voice) | 1987-07-18 |
| Movie | Lupin the Third: The Fuma Conspiracy | Inspector Koichi Zenigata (voice) | 1987-12-26 |
| Movie | Transformers: Scramble City | Megatron / Devastator (voice) | 1986-04-01 |
| Movie | Dengeki Sentai Changeman: The Movie | Star King Bazoo (voice) | 1985-03-15 |
| Series | Dengeki Sentai Changeman | Star King Bazoo (voice) | 1985-02-02 |
| Movie | Dengeki Sentai Changeman: Shuttle Base! The Critical Moment! | Star King Bazoo (voice) | 1985-07-13 |
| Movie | Vampire Hunter D | Count Magnus Lee (voice) | 1985-12-21 |
| Movie | Lensman | Lord Helmuth (voice) | 1984-06-07 |
| Series | Panzer World Galient | マーダル | 1984-10-05 |
| Series | Acrobunch | King Deros (voice) | 1982-05-05 |
| Movie | Space Runaway Ideon: Be Invoked | Gindoro (voice) | 1982-07-10 |
| Movie | Star of the Giants | Ittetsu Hoshi (voice) | 1982-08-21 |
| Movie | Space Runaway Ideon: Contact | Gindoro Jinma, Zou Habel Gande (voice) | 1982-07-10 |
| Movie | Doraemon: Nobita's Dinosaur | Black Boy (voice) | 1980-03-15 |
| Movie | Ringing Bell | Wolf (voice) | 1978-03-11 |
| Series | Voltes V | Professor Hamaguchi | 1977-06-04 |
| Series | Blocker Gundan 4 Machine Blaster | 由利元来博士 | 1976-07-05 |
| Series | Reideen the Brave | Gohrai | 1975-04-04 |
| Series | Decision | (voice) | 1971-04-03 |
| Series | Kimba the White Lion | Toto (voice) | 1965-10-06 |
| Series | Astro Boy | Skank (voice) | 1963-01-01 |
| Series | Moonlight Mask | Shimomura | 1958-02-24 |