Summer Wars
2009, Japanese. Directed by Mamoru Hosoda.
Always protect your network.
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.
- Runtime
- 1h 54m
- Post-credits
- None listed
- Language
- Japanese
- Rated
- PG
Start now and it ends at ….
Worth the Hype
Clear your evening for this.
7.5/10 from 1,091 TMDB viewer ratings.
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Where to watch Summer Wars
Summer Wars is streaming on HBO Max in India.
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Fandango At HomeAvailability in India as of 9 November 2026. Streaming data by JustWatch.
Cast & crew
- Mamoru HosodaDirector
- Ryunosuke KamikiKenji Koiso (voice)
- Hitomi MiyauchiNatsuki Shinohara (voice)
- Mitsuki TanimuraKazuma Ikezawa (voice)
- Sumiko FujiSakae Jinnouchi (voice)
- Ayumu SaitoWabisuke Jinnouchi (voice)
- Takahiro YokokawaTakashi Sakuma (voice)
- Kiyomi TanigawaYukiko Shinohara (voice)
- Mutsumi SasakiKazuo Shinohara (voice)
- Mieko NobusawaMariko Jinnouchi (voice)
- Takuya KirimotoRiichi Jinnouchi (voice)
- Sakiko TamagawaRika Jinnouchi (voice)
- Ichiro NagaiMansuke Jinnouchi (voice)
Details
- Released
- 1 August 2009
- Original title
- サマーウォーズ
- Country
- Japan
- Written by
- Satoko Okudera
- Box office
- $18M
Check ratings elsewhere
News & fan talk
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Summer Wars: quick answers
Is Summer Wars worth watching?
Our verdict is Worth the Hype: Clear your evening for this. It scores 7.5/10 from 1,091 TMDB viewer ratings.
How long is Summer Wars?
Summer Wars runs 114 minutes (1h 54m).
Does Summer Wars have a post-credits scene?
None is listed for Summer Wars. Viewers tag these on TMDB, so a brand-new film may not be tagged yet.
Summer Wars parents guide: is it suitable for kids?
Summer Wars is rated PG in India. That rating means it is generally fine for children.
Which OTT platform is Summer Wars on?
Summer Wars is streaming on HBO Max in India. (Checked 9 November 2026.)
What movies are like Summer Wars?
If you liked Summer Wars, try Barbie Video Game Hero, Roujin Z, Expelled from Paradise.
Who directed Summer Wars?
Summer Wars (2009) was directed by Mamoru Hosoda and stars Ryunosuke Kamiki, Hitomi Miyauchi, Mitsuki Tanimura.