He is most famous for his roles of Ken the Eagle from "Gatchaman", Garma Zabi from "Mobile Suit Gundam", Professor Oak from "Pokémon Origins", Jean Pierre Polnareff from "JoJo's Bizarre Adventure", Nephrite from "Sailor Moon", Horace Slughorn from "Harry Potter" and Speed Racer (Go Mifune) from the original anime.
- James (first - eighth seasons)
- Troublesome Trucks (Heroes)
- Jeremiah Jobling (Bertie's Chase only)
- Some Cricketers
- The Vet
- Stout Band Member (eighth season only)
- Gordon's fireman (Wrong Road)
- Toby's driver (Toby and the Flood)
- Oliver's driver (Oliver's Find)
- Stepney's driver (Train Stops Play)
- Duncan's driver (Duncan Gets Spooked)
- Guard (The Flying Kipper and Percy's Promise)
- A Signalman (Ghost Train)
- Lorry 2's driver (Horrid Lorry)
- Foreman (Henry and the Elephant)
- Harold's pilot (Sir Topham Hatt's Holiday)
- Shunting Yards Manager (Gordon Takes Charge only)
- A Station Speaker (Thomas and the Magic Railroad)
- Some Passengers (Edward, Trevor and the Really Useful Party)
- Some people (Granpuff)
- Thomas Anthem (performed)
- Every Cloud has a Silver Lining (performed)
- Harold the Helicopter (performed)
- James the Really Splendid Engine (performed as James)
- Never, Never, Never Give Up (performed)
- Five New Engines in the Shed (performed)
- The Red Balloon (performed)
- Troublesome Trucks (performed)
- The Whistle Song (performed)
- He played Paul McCartney in the Japanese version of "Yellow Submarine", making him one of the few international Thomas voice actors to have a connection with The Beatles.
- He, alongside Caspar Phillipson, and Mario Castañeda voiced Nephrite from "Sailor Moon" in their respective languages.
- Both he and Tokuyoshi Kawashima voiced characters together from "Pokémon Origins".
- He has also worked on it with Simen Sand, Trond Teigen and Janusz Wituch when they voiced Professor Oak from Pokémon in their respective languages.
- Adriana Casas, Loukas Frangoulis, Piotr Bąk, Paul Disbergen, Mikołaj Klimek, Bartosz Martyna, Tokuyoshi Kawashima, Dor Srugo, Mildred Barrera, Roberto Gutiérrez, Finn Poncin, Hinako Sasaki, Shinichirō Miki, Hisao Egawa, Javier Olguín, Kōichi Sakaguchi, Susa Saukko, Pasi Ruohonen, Dariusz Błażejewski, Kiyoyuki Yanada, Waldemar Barwiński, Junichi Kanemaru, Artur Pontek, Hiroshi Tsuchida, Krzysztof Szczerbiński, Josie Yee, Diana Pérez, Grzegorz Drojewski, Klaudiusz Kaufmann, Mayra Arellano, Sander de Heer, Hiroko Emori, Naomi Shindō, Justyna Bojczuk, Miłogost Reczek, Tsutomu Densaka, Bruno Coronel, Xóchitl Ugarte, Miguel Ángel Leal, Noriko Shitaya, Anna Gajewska, Gaby Ugarte, Hiro Nakajima, Roberto Mendiola, Chikara Osaka, Kan Tanaka, Yohei Nishina, Salvador Reyes, Yuri Shiratori, Bin Shimada, Ángel Amorós, Kenta Miyake, Keiko Toda, Octavio Rojas, Masaharu Satō, Kiyonobu Suzuki, Talya Barkay, Yehonatan Magon, Kumiko Higa, Nir Ron, Joanna Pach-Żbikowska, Scott Maurstad, Olga Kuznetsova, Jan Kulczycki, Moisés Iván Mora, Tomohiro Nishimura, Piotr Bajtlik, Hideki Takahashi, Alan Prieto, Beata Jankowska-Tzimas, Tetsu Inada, Nobutoshi Canna, Krystyna Kozanecka, Masayuki Omoro, Gadi Levy, Paweł Szczesny, Erik Skjøld, Leonardo García, Dafnis Fernández, Adrian Perdjon, Gerardo García, Józef Mika, Lena Meieran, Manuel Campuzano, César Árias, Dulce Guerrero, Armando Coria, Salvador Serrano, Leyla Rangel, Samuel Harjanne, Cezary Kwieciński, Hikaru Midorikawa, Juha Paananen, Hugolin Chevrette-Landesque, José Ángel Torres, Elise Langenoja, Markus Bäckman, Jorge Ornelas, Henri Piispanen, Arto Nieminen, Timo Kinzel, Katharina von Keller and Pauli Virta have also worked on it.
- He, Geneviève Déry, Robert Wilfort, Rolando de Castro, Claes Ljungmark, Leyla Rangel, Ruth Toscano, Nathan Clarke, Simon Fisher-Becker, César Izaguirre, César Árias, Yigal Mizrachi, Hideyuki Umezu, José Luis Orozco, Jesse Grimm, Aryeh Cherner, Zuzanna Galia, Ángel Amorós, Tokuyoshi Kawashima, Octavio Rojas, Scott Maurstad, John Hurt, Humberto Vélez, Jorge Santos, Irwin Daayán, Masashi Ebara, Blas García, Dov Reiser, Albert Cohen, Hadar Shachaf Ma'ayan, Zvika Schwartzberg, Jamie Campbell Bower, Thomas Fritsch, Norma Iturbe and Rob Rackstraw have all worked in the "Harry Potter" films. Angela Kyriacou and Eddie Redmayne also had roles in it's prequel "Fantastic Beasts and Where To Find Them".