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In Theaters · September 4, 2026

cocoon - One Summer of Girlhood
Trailer Reactions

Animation · Drama · War · TV Movie

San and Mayu attend an all-girls school on a warm and tranquil island. When war reaches their shores, they are ordered to help nurse the wounded in a military hospital hidden away in a cave. Amidst escalating death and brutality, the friends struggle to find solace in their fragile lives.

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The Trailer

The official cocoon - One Summer of Girlhood trailer, right here

Dropped August 18, 2026

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Trailer: Official Trailer [Subtitled]

Dropped July 16, 2026

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The premise

cocoon - One Summer of Girlhood (2026)

Opening against The Runner, this one will be fighting for the same weekend conversation.

cocoon - One Summer of Girlhood opens in theaters on September 4, 2026.

Meet the cast

Who you’ll see in the trailer

The cast is fronted by Marika Ito, Hikari Mitsushima and Yoko Hikasa. Marika Ito plays San (voice).

Behind the camera

The history behind cocoon - One Summer of Girlhood

The film comes from Sasayuri, NHK Enterprises and NHK. Yukimitsu Ina directs, with writing credits for Taku Kishimoto. The finished film runs 1 hour.

Why this trailer earns a reaction

This trailer was made to be reacted to

War-film trailers carry weight. The reactions worth keeping are the quiet, honest ones.

Theatrical releases are won in the weeks before opening night, and trailer reactions are where that energy starts. Yours can be part of it.

Reactions on Reactr

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FAQ

cocoon - One Summer of Girlhood: quick answers

How do I record a cocoon - One Summer of Girlhood trailer reaction?

Open the reaction recorder on your phone at reactr.film/studio/cocoon-one-summer-of-girlhood, choose camera or voice only, and press record while the trailer plays. Reactr captures your reaction and gives you a share-ready clip when the trailer ends. It is free.

Do I have to be on camera?

No. Voice Reaction mode records your commentary with the microphone only: the camera stays off, no face is recorded, and you still get a share-ready clip for your channel.

When does cocoon - One Summer of Girlhood come out?

cocoon - One Summer of Girlhood is scheduled to open in US theaters on September 4, 2026. Dates can shift, so check back for updates.

Who stars in cocoon - One Summer of Girlhood?

Marika Ito, Hikari Mitsushima, Yoko Hikasa, Rena Motomura and Chinatsu Akasaki lead the cast, directed by Yukimitsu Ina.

Is Reactr free?

Yes. Recording reaction clips on Reactr is free, with no paywall on the finished clip. You own your clip and can post it to TikTok, Reels, Shorts, or anywhere else. Reactr makes money from studios and sponsors, not from creators.

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