| "Katts and Dog" | Ron Nakemura |
| Roxy Hunter and the Myth of the Mermaid | Kyoto |
| "Street Legal" | Jonathan Imatsu / ... (2 episodes, 1988-1989) |
| Blood Relations | Heart Surgeon |
| Captive Hearts | Masato |
| "Katts and Dog" | Ron Nakemura (unknown episodes) |
| Dead Ringers | Pharmacist (as Denis Akiyama) |
| "Counterstrike" | Lok (2 episodes, 1990-1991) |
| "Kung Fu: The Legend Continues" | Lai / ... (2 episodes, 1994-1996) |
| In the Eyes of a Stranger | (as Denis Akiyama) |
| Ghost Mom | Yamato |
| Guilty as Sin | Lab Technician |
| Johnny Mnemonic | Shinji |
| "Sailor Moon" | Malachite (16 episodes, 1995) |
| Visitors of the Night | Stranger #2 |
| Balance of Power | Hastishita |
| Buried Secrets | Doctor #1 |
| Extreme Measures | Prof. Asakura |
| L5: First City in Space | Yoshio Mori |
| Lethal Tender | Det. Peter 'Playdo' Ota (as Denis Akiyama) |
| Space Truckers | Tech Leader |
| The Planet of Junior Brown | Mr. Tanaka (as Denis Akiyama) |
| Killing Moon | Dr. Yamada (as Denis Akiyama) |
| "The Silver Surfer" | Watcher Prime |
| After Alice | Owen Gackstetter (as Denis Akiyama) |
| Code Name Phoenix | Dr. Fong |
| Killing Moon | Dr. Yamada (as Denis Akiyama) |
| "Mythic Warriors: Guardians of the Legend" | Amycus / ... (2 episodes, 1998-1999) |
| "Little Bear" | (unknown episodes) |
| The Last Debate | TV Makeup Artist (as Denis Akiyama) |
| "Wild C.A.T.S: Covert Action Teams" | Dockwell (2 episodes) |
| The Judge | Peter Jacoby (as Dennis Akiyama) |
| Onimusha | Nobunaga Oda / Narrator (voice: English version) (as Denis Akiyama) |
| Cypher | Speaker Omaha (as Denis Akiyama) |
| "Wild C.A.T.S: Covert Action Teams" | Dockwell (2 episodes) |
| "Medabots" | Mr. Referee |
| Haven't We Met Before? | |
| The Brady Bunch in the White House | Hopeful Man |
| "Power Stone" | (voice) |
| My Baby's Daddy | Cha Ching (as Denis Akiyama) |
| Eloise at the Plaza | Prince of Kushin (as Dennis Akiyama) |
| Welcome to Mooseport | Izuki Nami (as Denis Akiyama) |
| The Pacifier | Mr. Chun |
| "King" | |
| H2O | Kazio Izumi (as Denis Akiyama) |
| H2O | Kazio Izumi (as Denis Akiyama) |
| The Cradle Will Fall | Dr. Fachita (as Denis Akiyama) |
