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Summer Wars poster
Movie

サマーウォーズ

Confirmed2009-08-017.57.7Trakt

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.

Summer Wars is a 2009 Japanese animated film following a teenage math genius who agrees to pose as his crush's fiancé during a family reunion, only to accidentally trigger a collision between a virtual world and Earth. This sci-fi romance comedy blends heartfelt family drama with high-stakes digital action. The film is available on various streaming platforms and home video formats.

When does Summer Wars come out?

Where to watch

Streaming availability in United States

Sourced from TMDB · updated daily

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Digital purchase & rental in United States

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Where to watch Summer Wars by country

Trailer

Official Trailer [Subtitled]

YouTube · 2025-06-27
FAQ

Summer Wars — frequently asked

When was Summer Wars released?

Summer Wars premiered on August 1, 2009 in Japan.

Is Summer Wars available to stream?

Yes, Summer Wars is available on multiple streaming platforms including Netflix in select regions and other digital retailers. Availability varies by location and changes over time.

Who directed Summer Wars?

Summer Wars was directed by Mamoru Hosoda, a celebrated Japanese animator known for his visually inventive science-fiction stories.

What language is Summer Wars in?

Summer Wars is a Japanese animated film with both Japanese and English dub options available depending on where you watch it.

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