The 4th Seiyu Awards ceremony was held on March 6, 2010 at UDX Theater in Akihabara, Tokyo.[1][2] It was followed up by a Special Stage Event with the winners on March 28.[3] The period of general voting lasted from Oct 1, 2009 to Jan 1, 2010.
| Winners | Agency | Characters | Anime |
|---|---|---|---|
| Best Actor in leading role | |||
| Daisuke Ono | Mausu Promotion | Sebastian Michaelis | Black Butler |
| Best Actress in leading role | |||
| Miyuki Sawashiro | Mausu Promotion | Canaan Lag Seeing |
Canaan Tegami Bachi |
| Best Actors in supporting roles | |||
| Daisuke Namikawa | Across Entertainment | Mikage Shota Kazehaya |
07-Ghost Kimi ni Todoke |
| Shin-ichiro Miki | 81 Produce | Roy Mustang Lockon Stratos |
Fullmetal Alchemist Mobile Suit Gundam 00 |
| Best Actresses in supporting roles | |||
| Kikuko Inoue | Office Anemone | Sanae Furukawa |
CLANNAD -AFTER STORY- Macross Frontier |
| Yui Horie | VIMS | Minori Kushieda Tsubasa Hanekawa |
Toradora! Bakemonogatari |
| Best Rookie actors | |||
| Atsushi Abe | Ken Production | Toma Kamijo | A Certain Magical Index |
| Tomoaki Maeno | Arts Vision | Toya Fujii Saku Oyagi |
White Album Sora no Manimani |
| Best Rookie actresses | |||
| Kanae Ito | Aoni Production | Mihoshi Akeno Koume Suzukawa |
Sora no Manimani Taishō Baseball Girls |
| Aki Toyosaki | Music Ray'n | Yui Hirasawa Kana Nakamachi |
K-On! Kanamemo |
| Best Personality | |||
| Winner | Agency | Radio Programs | Broadcasting Station |
| Masaya Onosaka | Aoni Production | Atsumare Masakano Henshubu A&G GAME MASTER GT-R |
Radio Kansai Cho!A&G (AGQR) |
| Best Musical Performance | |||
| Winners | Record Label | Album | Anime |
| Hokago Tea Time (Aki Toyosaki, Yōko Hikasa, Satomi Sato, Minako Kotobuki, Ayana Taketatsu) |
Pony Canyon | Hokago Tea Time | K-On! |
| Winners | Agency | ||
| Special Achievement Award | |||
| Kazue Takahashi | Freelance (final career) | ||
| Achievement Award | |||
| Tessho Genda | 81 Produce | ||
| Kazuko Sugiyama | Aoni Production | ||
| Nobuo Tanaka | Haikyō | ||
| Synergy Award | |||
| Mobile Suit Gundam (Toru Furuya, Shūichi Ikeda) | |||
| Kei Tomiyama Memorial Award (Topical Award) | |||
| Nana Mizuki | Sigma Seven | ||
| Overseas Fan's Award | |||
| Mitsuki Saiga | Ken Production | ||
| Kids Family Award | |||
| Wasabi Mizuta | Production Baobab | ||