Summer Wars

Always protect your network.

7.520091h 54m

Released

Animation

Science Fiction

Overview

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.

StatusReleased

Release Date2009-08-01

Runtime1h 54m

Languages日本語

CountriesJapan

Revenue$18,434,328

Keywords

card game

artificial intelligence (a.i.)

Videos

2 total

Trailer

Official Trailer [Subtitled]

Stream

HBO Max Amazon Channel

YouTube TV

HBO Max

Buy

Amazon Video

Apple TV Store

Google Play Movies

YouTube

Fandango At Home

Rent

Amazon Video

Apple TV Store

Google Play Movies

YouTube

Fandango At Home

US data via JustWatch

Cast & Crew

Ryunosuke Kamiki

as Kenji Koiso (voice)

Hitomi Miyauchi

as Natsuki Shinohara (voice)

Mitsuki Tanimura

as Kazuma Ikezawa (voice)

Sumiko Fuji

as Sakae Jinnouchi (voice)

Ayumu Saito

as Wabisuke Jinnouchi (voice)

Takahiro Yokokawa

as Takashi Sakuma (voice)

Kiyomi Tanigawa

as Yukiko Shinohara (voice)

Mutsumi Sasaki

as Kazuo Shinohara (voice)

Mieko Nobusawa

as Mariko Jinnouchi (voice)

Takuya Kirimoto

as Riichi Jinnouchi (voice)

Reviews

CinemaSerf

Aug 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 …

Full review