From Science Fiction Awards Watch, here are the 2012 Seiun nominees:
Japanese Novel
- Tengoku to Chikoku
- Yakusoku no Hakobune (Ark of Promises)
- Kanzennaru Binagaryuu no Hi
- Hikari o Wasureta Sei de (Star of Forgotten Light)
- Kitsune no Tsuki (Fox Moon)
- Genocide
Japanese Short Story
- “Space Kinyuudou”
- “Ushinawareta Wakusei no Isan” (“Legacy of the Lost Planet”)
- “Utau Sensuikan to Piapia Douga”
- “Zero Nendai no Rinkaiten” (“The Critical Point of Era Zero”)
- “Kore wa Pen Desu” (“This is a Pen”)
- “Saikou no Sofu” (“The Ultimate Empress’s Grandfather”)
Foreign Novel
- The Windup Girl, Paolo Bacigalupi
- The City and the City, China Miéville
- The Chronoliths, Robert Charles Wilson
- Dhalgren, Samuel Delaney
- Little Brother, Cory Doctorow
- Millennium People, James Ballard
Foreign Short Story
- “The Pelican Bar”, Karen Joy Fowler
- “The Lifecycle of Software Objects”, Ted Chiang
- “The Gambler”, Paolo Bacigalupi
- “The People of Sand and Slag”, Paolo Bacigalupi
- “Troika”, Alastair Reynolds
- “The Little Goddess”, Ian McDonald
Media
- Mahou Shoujo Madoka Magica (Puella Magi Madoka Magica)
- Paul
- Mawaru Penguin Drum (The Turning Penguin Drum)
- Steins;Gate
- Tiger & Bunny
- Real Steel
Comics
- Bokura no Yoake (Our Daybreak) volume 2
- Kidou Senshi GUNDAM: THE ORIGIN (Mobile Suit Gundam: The Origin)
- Igyuutachi ni Yoru to Sekai wa…
- Mirai Nikki (Future Diary) volume 12
- Halcyon Ranch volume 2
- Gaidenrou
- Excel Saga volume 27
Art
- Katsuyuki Hoshino
- Katsuya Terada
- Koushi Suzuki
- Mikio Masuda
- Kairi Yura
- Kenichiro Tomiyasu
- Pablo Uchida
- Daisuke Nishijima
- Naoyuki Katou
- Naohiro Washio
Nonfiction
- Kindai Nihon Kisoushousetsushi: Meiji Hen
- Bradbury Nendaiki (The Bradbury Chronicles)
- 3.11 no Mirai Nihon – SF – Souzouryoku (Future Japans of 3/11 – SF – Creativity) [“3/11” is shorthand for last year’s earthquake and tsunami]
- Ranshi Dokusha no SF Kougi (The Astigmatic Reader’s SF Lectures)
- Azuma Hideo < Soutokushuu > — Bishoujo – SF – Fujouri Gyaku, Soshite Shissou (The Hideo Azuma Omnibus – Beautiful Girls – SF – Reversing Absurdity, Then Vanishing)
Open Category
No nominations, though there is a write-in option (as there is for all categories).