“Is there a way to watch ‘Nagasaki — In the Shadow of the Flash —’ for free?” If you’re wondering which streaming services carry this much-talked-about film that portrays lesser-known history from the A-bombed city of Nagasaki, you’re not alone. We’ve thoroughly checked major platforms like U-NEXT, Amazon Prime, and Netflix! We cover everything you’ll want to know right now, including opportunities for free viewing and our release predictions. Start by reading this guide to find the smartest way to watch!

What is “Nagasaki — In the Shadow of the Flash —”?
“Nagasaki — In the Shadow of the Flash —” is a Japanese film slated for nationwide release on August 1, 2025, depicting a human drama about the young student nurses who provided relief to A-bomb survivors in Nagasaki at the end of World War II. The screenplay is based on memoirs compiled by nurses of the Japanese Red Cross Society, building a realistic story grounded in historical fact. The film is directed by 松本准平, and stars 菊池日菜子, 小野花梨, and 川床明日香 in the lead roles. Another highlight is that 福山雅治 produced the theme song, sung by the three leads. This work vividly portrays the horrors of war alongside hope in sustaining life and the courage of young people.
Background and Key Points
While the film squarely confronts the heavy theme of Nagasaki’s atomic bombing, it’s structured to offer both emotion and learning. Timed with the 80th year since the end of the war in 2025, it’s drawing significant attention. It’s also notable as the first film investment by Japanet, drawing interest for the company’s commitment to engaging with local history.
Synopsis and Details of “Nagasaki — In the Shadow of the Flash —”
Set immediately after the atomic bombing of Nagasaki on August 9, 1945, the film tells a story based on the real-life efforts of young student nurses rushing to aid survivors amid chaos. As the city suffers catastrophic damage from the sudden bomb, girls training to become nurses risk their own lives to save others. Through their struggles, conflicts, and determination to live with hope, the film deeply conveys the tragedy of war and the preciousness of life.
Production Info
- Title: 『長崎―閃光の影で―』
- Release Date: August 1, 2025 (nationwide) *Advance screenings in Nagasaki from July 25
- Director: 松本准平
- Screenplay: 松本准平 (Original concept: memoirs by nurses of the Japanese Red Cross Society Nagasaki branch)
- Cast: 菊池日菜子, 小野花梨, 川床明日香, etc.
- Theme Song Producer: 福山雅治
- Genre: Human drama / War / Based on a true story
- Production & Investment: ジャパネットホールディングス
Streaming Services Likely to Offer “Nagasaki — In the Shadow of the Flash —”
“Nagasaki — In the Shadow of the Flash —” isn’t available on any streaming services yet, but based on trends for similar works and each platform’s track record, we’ve researched where it’s likely to stream. In particular, U-NEXT, Amazon Prime, and Netflix—which frequently carry new and buzzworthy Japanese films—are strong candidates. Below is a table summarizing potential subscription services, estimated timing, pricing, and how to watch for free.
Service | Estimated Start | Price (tax incl.) | How to Watch Free |
---|---|---|---|
U-NEXT | February 2026 | ¥2,189/month | 31-day free trial + use points |
Amazon Prime Video | January 2026 | ¥600/month | 30-day free trial |
Netflix | March 2026 | ¥790–¥1,980/month | No free trial (paid only after release) |
Lemino | March 2026 | ¥550/month | First month free for new users |
Hulu | April 2026 | ¥1,026/month | 2-week free trial |
U-NEXT is especially noteworthy because you can sometimes use points granted during the free trial to watch new releases at effectively no cost.
FAQ for Watching “Nagasaki — In the Shadow of the Flash —”
Here we answer common questions people have about “Nagasaki — In the Shadow of the Flash —.” Use this as a reference to clear up any doubts before watching so you can enjoy the film with peace of mind.
Q1. How can I watch it?
Currently, it’s only available in theaters (nationwide release on August 1, 2025). We expect it to stream later on services such as U-NEXT and Amazon Prime, so keep an eye on updates.
Q2. Is there a way to watch for free?
At this time, there’s no free viewing option. However, once it begins streaming, you may be able to watch at effectively no cost by using free trials offered by those services.
Q3. Is it based on a true story?
Yes. It’s a fact-based work built on memoirs by Japanese Red Cross nurses who aided A-bomb survivors. It’s expected to receive high marks for its realistic depiction of the tragedy of war and the atomic bombing.
Q4. What are the reviews like?
Although not yet released, test screenings and advance showings have yielded moving reactions such as “I couldn’t stop crying” and “It made me feel the preciousness of life.” The performances of the young leads are also drawing attention.

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