The 1st Seiyu Awards ceremony was held on March 3, 2007 at the Akiba 3D Theater in Akihabara, Tokyo.[1] General voting categories had 10 nominations each for Best Lead (actor/actress), Best Supporting (actor/actress), Rookie (actor/actress), Singing, and Personality. Special Achievement, Achievement, and Synergy Awards were selected by the event without nominations.[2] The period of general voting lasted from October 21, 2006 to January 10, 2007.
Winners are listed below.[3]
| Winners | Agency | Characters | Anime |
|---|---|---|---|
| Best Actor in leading role | |||
| Jun Fukuyama | Production Baobab | Lelouch Lamperouge | Code Geass - Lelouch of the Rebellion |
| Best Actress in leading role | |||
| Romi Park | Theatrical group En | Nana Osaki | NANA |
| Best Actors in supporting roles | |||
| Akira Ishida | Mausu Promotion | Athrun Zala | Mobile Suit Gundam Seed Destiny |
| Kōki Miyata | 81 Produce | Kazumi Yoshinaga | Yoshinaga-san Chi no Gargoyle |
| Best Actresses in supporting roles | |||
| Ami Koshimizu | Gekidan Wakakusa | Kallen Stadtfeld | Code Geass - Lelouch of the Rebellion |
| Yuko Goto | Production Baobab | Mikuru Asahina | The Melancholy of Haruhi Suzumiya |
| Best Rookie actors | |||
| Tetsuya Kakihara | 81 Produce | Mikoto Yutaka | Princess Princess |
| Masakazu Morita | Aoni Production | Ichigo Kurosaki | Bleach |
| Best Rookie actresses | |||
| Yui Kano | Aoni Production | Momoko Kuzuryu | Sumomomo Momomo |
| Aya Hirano | Space Craft | Haruhi Suzumiya | The Melancholy of Haruhi Suzumiya |
| Best Personality | |||
| Winner | Agency | Radio Programs | Broadcasting Station |
| Masumi Asano | Arts Vision | A&G Super Radio Show - Anispa! | JOQR |
| Best Musical Performance | |||
| Winners | Record Label | Song | Anime |
| Nana Mizuki | King Records | Justice to Believe, opening theme | Wild Arms V |
| Special Achievement Award | |||
| Winners | Agency | ||
| Kei Tomiyama | Production Baobab (final career) | ||
| Achievement Award | |||
| Toru Ohira | Ohira Production | ||
| Masako Ikeda | Haikyō | ||
| Noriko Ohara | Production Baobab | ||
| Mariko Mukai | 81 Produce | ||
| Synergy Award | |||
| Pokémon | |||