Summer Wars (2009)
Audiences and critics agree.
The FilmyChill Score combines audience ratings and critics' reception, and updates twice a day. No studio or platform can pay for a score. How the score works
Summer Wars is streaming in Japan on Netflix, Prime Video, Hulu.
What the audience says
Summer Wars has pulled the kind of numbers most Japanese films never see. It carries a 7.5/10 on TMDB across 1,086 ratings — comfortably clear of the pack. It clocks in at a standard 114 minutes. In Japan you can stream it on Netflix, Prime Video, Hulu.
Should you spend 1h 54m on it?
1h 54m of Japanese animation with science fiction threaded through, fine for the whole family. Runs about as long as you'd expect, so no scheduling gymnastics needed.
- Why
- Currently 7.5/10 from 1,086 ratings, which is a good sign this early.
- Skip if
- you want live action tonight
- Best for
- An evening with the household together
Story
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.
Good to know
| Runtime | 1h 54m |
| Watch with family? | G · Yes — family friendly |
| Genre | Animation / Science Fiction |
| Language | Japanese |
| Best screen | Stream at home |
Director
Mamoru Hosoda
Cast
Where to watch in Japan
Included with a subscription — no extra charge on these platforms.
Availability as of 11 Oct 2026 — platforms may change over time.
More: Everything new on Netflix · All Netflix titles in Japan
Trailer
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