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Summer Wars (2009)
"Samâ uôzu" (original title)

PG  |   |  Animation, Adventure, Comedy  |  1 August 2009 (Japan)
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Ratings: 7.6/10 from 14,213 users   Metascore: 63/100
Reviews: 46 user | 77 critic | 12 from

A student tries to fix a problem he accidentally caused in OZ, a digital world, while pretending to be the fiancé of his friend at her grandmother's 90th birthday.



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Cast overview, first billed only:
Ryûnosuke Kamiki ...
Kenji Koiso (voice)
Nanami Sakuraba ...
Natsuki Shinohara (voice)
Kazuma Ikezawa (voice)
Takahiro Yokokawa ...
Takashi Sakuma (voice)
Mieko Nobusawa ...
Mariko Jin'nôchi (voice)
Mutsumi Sasaki ...
Kazuo Shinohara (voice)
Takashi Kobayashi ...
Tasuke Jin'nôchi (voice)
Yôji Tanaka ...
Yorihiko Jin'nôchi (voice)
Kiyomi Tanigawa ...
Yukiko Shinohara (voice)
Hashiya Nakamura ...
Kunihiko Jin'nôchi (voice)
Sakiko Tamagawa ...
Rika Jin'nôchi (voice)
Kaori Yamagata ...
Naomi Miwa (voice)
Takuya Kirimoto ...
Ri'ichi Jin'nôchi (voice)
Mitsutaka Itakura ...
Katsuhiko Jin'nôchi (voice)
Tagame Tamura ...
Kiyomi Ikezawa (voice)


Kenji Koiso, an eleventh grade math genius, agrees to take a summer job at the Nagano hometown of his crush, Natuski. When he arrives, he finds that her family have reunited to celebrate the 90th birthday of the family matriarch. His job is to pretend to be Natsuki's fiancé. Meanwhile, his attempt to solve a mathematical equation causes a parallel world's collision with earth. Written by Chris Evans

Plot Summary | Plot Synopsis

Motion Picture Rating (MPAA)

Rated PG for action violence, some suggestive content, language, mild thematic material and incidental smoking | See all certifications »

Parents Guide:



Official Sites:

| |  »




Release Date:

1 August 2009 (Japan)  »

Also Known As:

Summer Wars  »

Box Office

Opening Weekend:

$1,412 (USA) (24 December 2010)


$78,182 (USA) (4 February 2011)

Company Credits

Show detailed on  »

Technical Specs


Sound Mix:


Aspect Ratio:

1.85 : 1
See  »

Did You Know?


Warner Brothers originally considered localizing the film themselves before licensing it off to FUNimation Entertainment. See more »


Takashi Sakuma: Please tell me you didn't break the internet.
See more »


Version of Dejimon adobenchâ - Bokura no wô gêmu! (2000) See more »


Bokura no natsu no yume
Written and Performed by Tatsurô Yamashita
See more »

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User Reviews

This is how you make animation!
30 November 2012 | by (Netherlands) – See all my reviews

As Kenji, a high school student, takes on a job for the most popular girl in school, Natsuki, stuff is quickly spiralling out of control for him. Not only is this job for Natsuki not entirely what he had expected, but an A.I. has taken over his Avatar in the virtual world of Oz, wreaking allsorts of havoc. This is the premise of a roller-coaster ride that is exciting, sweet, strange, touching, funny, cool, exhilarating and most of all, a lot of fun. If someone asked me to make a good animation /science fiction/ romance/ action/ comedy/ drama/ movie about a virtual world, a family, Japanse high school students in a save the world kind of scenario: I'd probably laugh in their faces... Director Mamoru Hosoda however likely said something along these lines:"Yeah, sounds cool!". And continued on to make an awesome movie. It baffles me how he pulled this off with this wacky scenario, every scene sets the right tone, has the perfect pacing and touches the right strings at the right time. Summer Wars (and the also amazing Girl Who Leapt Through Time) made it clear to me Japan has the one of the best directors on the planet in animation with Mamoru Hosoda, and I can't wait to see what more he will conjure up. Highly recommended!

4 of 5 people found this review helpful.  Was this review helpful to you?

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I thought Kazuma was a girl at first... belac77
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