Summer Wars poster

Summer Wars

Always protect your network.

7.5(1,087)20091h 54m8

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.

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Status
Released
Budget
—
Box office
$18.4M
Language
Japanese
  • card game
  • artificial intelligence (a.i.)
  • computer
  • hacker
  • virtual reality
  • family holiday
  • adult animation
  • cybercrime
  • anime

Top billed cast

Behind the camera

Produced in

Japan

Gallery

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Videos

Release dates

  • United StatesUS

    • TheatricalPG13 Oct 2010
    • Theatrical (limited)PG4K remaster27 Jul 2025
  • United KingdomGB

    • Physical1212 Feb 2011
    • Theatrical (limited)12A4K remaster6 Jul 2025
  • AustraliaAU

    • TheatricalPG20 Apr 2010
  • BrazilBR

    • Digital / OTTL27 Jul 2025
  • FinlandFI

    • TheatricalK-1125 Feb 2011
  • FranceFR

    • Theatrical9 Jun 2010
  • GermanyDE

    • Theatrical1216 Feb 2010
  • Hong KongHK

    • PremiereHong Kong Asian Film Festival24 Oct 2009
    • Theatrical (limited)4K restoration & 4DX11 Dec 2025
  • IrelandIE

    • Theatrical1212 Feb 2011
  • ItalyIT

    • PhysicalDVD / Blu-ray3 Nov 2010
  • JapanJP

    • TheatricalG1 Aug 2009
  • MexicoMX

    • Digital / OTTB10 Oct 2009

Frequently asked questions

Summer Wars was released on 1 August 2009.

Audience reviews

1
  • C

    CinemaSerf

    8/6/2025

    7/10

    It’s really quite apposite to watch this film at a time when governments across the world are merrily acquiescing to the demands of global tech to facilitate the rampant advance of AI. This story quite cleverly illustrates just how easily a collection of “Will Hunting” types can be used to crack even the most complex (2,000 digit) numeric code and allow nefarious access to a global network which manages just about ev…

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