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.
Directed by Mamoru Hosoda
card game
artificial intelligence (a.i.)
computer
hacker
virtual reality
family holiday
adult animation
cybercrime
anime
Rank
#29 in 2009·#2027 overall
Trailer
IMDB
N/A
Where to Watch
Cast
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)
Crew
Mamoru Hosoda
Director
Satoko Okudera
Screenplay
Akihiko Matsumoto
Original Music Composer
Nozomu Takahashi
Producer
Yuichiro Saito
Producer
Tatsuro Yamashita
Theme Song Performance
Takashi Okazaki
Character Designer
Ayako Hata
Key Animation
Shougo Furuya
Key Animation
Tomohisa Shimoyama
Key Animation
Yoshiyuki Sadamoto
Character Designer
Ryotaro Makihara
Key Animation
Popular Reviews
305 reviews
Mason
8.0★ · 07/11/26
Had done like deep metaphor that we shouldn’t rely on technology and shit especially cause like Telstra made all the v line trains stop this idea hit hard.
But the Animation and Art is genuinely amazing no glaze.
Had done like deep metaphor that we shouldn’t rely on technology and shit especially cause like Telstra made all the v line trains stop this idea hit hard.
But the Animation and Art is genuinely amazing no glaze.
Mimivamp
sword art online
sword art online
chainlinc
8.0★ · 05/05/26
Why is it called summer wars am I missing something…
Why is it called summer wars am I missing something…
