Summer Wars_
"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.
Starring
Ryunosuke Kamiki, Hitomi Miyauchi, Mitsuki Tanimura
Box Office
$18.4M
Updated Feb 16, 2026
WHERE TO WATCH
Apple TV
9 countries
Prime Video
8 countries
G
Google Play
2 countries
YouTube
1 country
Max
1 country
Hulu
1 country
DROPTHE_ GOSSIP
Year context
Summer Wars was released 17 years ago in 2009.
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 reunit...
Summer Wars is a Animation, Science Fiction film with a runtime of 1h 54m.
CAST (20)
Ryunosuke Kamiki
Kenji Koiso (voice)
Hitomi Miyauchi
Natsuki Shinohara (voice)
Mitsuki Tanimura
Kazuma Ikezawa (voice)
Sumiko Fuji
Sakae Jinnouchi (voice)
Ayumu Saito
Wabisuke Jinnouchi (voice)
Takahiro Yokokawa
Takashi Sakuma (voice)
Kiyomi Tanigawa
Yukiko Shinohara (voice)
Mutsumi Sasaki
Kazuo Shinohara (voice)
Mieko Nobusawa
Mariko Jinnouchi (voice)
Takuya Kirimoto
Riichi Jinnouchi (voice)
Sakiko Tamagawa
Rika Jinnouchi (voice)
Ichiro Nagai
Mansuke Jinnouchi (voice)
Takashi Kobayashi
Tasuke Jinnouchi (voice)
Yutaka Shimizu
Shota Jinnouchi (voice)
Kaori Yamagata
Naomi Miwa (voice)
Tagame Tamura
Kiyomi Ikezawa (voice)
Tadashi Nakamura
Mansaku Jinnouchi (voice)
Yoji Tanaka
Yorihiko Jinnouchi (voice)
HN
Hashiya Nakamura
Kunihiko Jinnouchi (voice)
Mitsutaka Itakura
Katsuhiko Jinnouchi (voice)
BOX OFFICE
$18.4M
Revenue
DETAILS
Release
Status
Released
Runtime
114 min (1h 54m)
Country
Rating
7.5/10 (1,001 votes)
Box Office
$18,434,328
FREQUENTLY ASKED QUESTIONS
What is Summer Wars about?
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.
How long is Summer Wars?
Summer Wars has a runtime of 114 minutes (1h 54m).
Who stars in Summer Wars?
The cast of Summer Wars includes Ryunosuke Kamiki, Hitomi Miyauchi, Mitsuki Tanimura, Sumiko Fuji, Ayumu Saito.
How much did Summer Wars make at the box office?
Summer Wars earned $18,434,328 worldwide at the box office.
What is the rating of Summer Wars?
Summer Wars has a rating of 7.5 out of 10 based on 1,001 votes on TMDB.
GENRES (2)
Animation
Science Fiction