Summer Wars poster

Summer Wars (2009)

Always protect your network.

AnimationScience Fiction 114 min ★ 7.5

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.

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Frequently asked questions

Where can I stream Summer Wars in United States?: In United States, Summer Wars is available to stream on YouTube TV and HBO Max.
Is Summer Wars on HBO Max?: Yes — Summer Wars is currently streaming on HBO Max in United States.
Can I watch Summer Wars for free?: Summer Wars isn't on a free, ad-supported service in United States right now. It's included with a subscription to YouTube TV and HBO Max.
Is Summer Wars available to stream in other countries?: Yes. Summer Wars is listed as streaming in 21 countries, and availability varies by region. A VPN lets you switch region to watch it from United States.

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