Summer Wars (2009)
Movie 1h 54m ★ 7.4/10
Good for tonight if you want to: blow my mind, family night
Summer Wars is an animation and science fiction movie from 2009. It is directed by Mamoru Hosoda. The cast includes Ichiro Nagai, Hitomi Miyauchi and Ryunosuke Kamiki. The running time is 1h 54m. Audiences give it a strong score of 7.4 out of 10.
Synopsis
Teenage math whiz Kenji Koiso agrees to take a summer job at the Nagano hometown of his crush, Natsuki. When he arrives, he finds that her family have reunited to celebrate the 90th birthday of their matriarch. His job: pretend to be Natsuki's fiancé. Meanwhile, his attempt to solve a mathematical equation causes a parallel world's collision with Earth.
Where to watch Summer Wars
Streaming catalogues change often. These links show which official services currently offer this title in your country:
Find on JustWatch Streaming & rental options (TMDB) IMDb page Parents guide
Cast & crew
- Mamoru HosodaDirector
- Ichiro Nagaias Mansuke Jinnouchi (voice)
- Hitomi Miyauchias Natsuki Shinohara (voice)
- Ryunosuke Kamikias Kenji Koiso (voice)
- Mieko Nobusawaas Mariko Jinnouchi (voice)
- Ayumu Saitoas Wabisuke Jinnouchi (voice)
- Mitsuki Tanimuraas Kazuma Ikezawa (voice)
- Sakiko Tamagawaas Rika Jinnouchi (voice)
- Sumiko Fujias Sakae Jinnouchi (voice)
Data from TMDB. Page last updated 3 Oct 2026. Download share image
Questions about Summer Wars
- What genre is Summer Wars?
- Summer Wars is categorised as Animation, Science Fiction.
- Who stars in Summer Wars?
- Ichiro Nagai, Hitomi Miyauchi, Ryunosuke Kamiki, Mieko Nobusawa, Ayumu Saito appear in the main cast.
- Who directed Summer Wars?
- Mamoru Hosoda directed Summer Wars.
- How long is Summer Wars?
- Summer Wars runs for 1h 54m (114 minutes).
- Is Summer Wars worth watching?
- It holds an audience score of 7.4/10. Check the similar titles below if you want alternatives in the same style.
- Where can I watch Summer Wars?
- Availability changes by country and over time. Use the "Where to watch" links on this page to see which legal streaming, rental or purchase services currently offer it.
