Black Box Diaries () is a 2024 documentary film directed by Shiori Itō. The film chronicles her investigation into her own sexual assault case.
The film premiered at the 2024 Sundance Film Festival. It was released in the United States and United Kingdom on October 25, 2024, by MTV Documentary Films and Dogwoof, respectively. The film was named one of the top 5 documentary films of 2024 by the National Board of Review, won a Peabody Award, and was nominated for Best Documentary Feature Film in the 97th Academy Awards.
Synopsis This film, her feature-length directorial debut, depicts Shiori Itō's journey into her investigation of the sexual violence she experienced.
When Itō met with Noriyuki Yamaguchi, he was the Washington, D.C. bureau chief of TBS, a major broadcaster in Japan. He was famous for his articles on Prime Minister Shinzo Abe and known for having ties with influential government officials.
The film starts with security camera footage of a hotel in Tokyo, showing a taxi at the entrance. In this video, Yamaguchi is dragging the severely intoxicated Itō out of the car and holding her up as he heads toward the hotel room.
After this night, Itō filed a report with the police, claiming that she had been sexually assaulted using a date rape drug. However, the police refused to accept the case, citing a lack of evidence beyond Itō's memory.
When Itō's side obtained the hotel surveillance footage, the police began to move forward with Yamaguchi's arrest and investigation. However, as police were waitingwith the arrest warrantfor Yamaguchi to disembark a flight, they received orders to halt immediately; the investigation was inexplicably halted, and the case was dropped without indictment. In late 2017, Michiyoshi Yunoki, a politician in Japan's House of Representatives, asked in a House hearing if the arrest had been halted because negative publicity at the time might have prevented Yamaguchi's biography of Abe from being published.
Faced with the failure of the investigation, Itō decided to come forward publicly. She attended the press conference in person, and made an accusation by revealing both her own and the other party's real names. This was extremely rare in cases of sexual violence in Japan and sparked widespread public reaction. As a pioneering figure in Japan's MeToo movement, which was gaining momentum worldwide at the time, a wave of support arose from women who resonated with Itō's experience. However, she also faced a storm of online slander, with accusations that she had a political intention aimed at attacking the government.
Enduring a storm of relentless defamation and the anguish of sexual violence, Itō continued investigating the case for over 7 years and ultimately won a civil lawsuit against Yamaguchi.
After Itō's historic accusation, several women in Japan also came forward with their real names to report sexual violence. This movement served as a catalyst, leading to the revision of laws on sexual offenses in 2023, making non-consensual sexual acts legally punishable in Japan, as in other countries.
One of the key figures in the film is "Detective A". He was the one who directly leaked to Itō the crucial information that an arrest warrant had been issued but suppressed. The film suggests this decision was made by high-ranking government officials.
Constructed with her smartphone recordings and other private video footage, the documentary depicts Itō's agony and reflections, shedding light on the sexual violence in Japan.
Production The film is based on the 2017 memoir written by Itō. The film was produced over six years, beginning shortly after Itō held a press conference to publicly accuse a prominent journalist of sexual assault.
It is directed by Itō and co-produced by her along with Hanna Aqvilin and Eric Nyari. The worldwide box office revenue was $7,000 on its opening weekend and totaled approximately $33,000 as of early March 2023. It was nominated for 33 film awards and won 21 of them.
Release The film had its world premiere at the 2024 Sundance Film Festival on January 20 as part of the World Cinema Documentary Competition. It also screened at South by Southwest on March 10, 2024, CPH:DOX on March 18, 2024, and Hot Docs Canadian International Documentary Festival on April 29, 2024.
In May 2024, MTV Documentary Films and Dogwoof acquired US and UK distribution rights to the film, respectively.
The film was screened at the Melbourne International Film Festival in Melbourne, Australia, in August 2024.and at the 2024 Adelaide Film Festival in October.
The film competed in the Documentary Competition category at the 20th Zurich Film Festival in October 2024.4, where it won the Golden Eye for best Documentary and the Audience Award across all competing entries.
On February 4, 2025, in the UK, the BBC first broadcast the documentary film as Episode 2 of Series 29 of their long-running documentary film strand Storyville, as part of the 2025 series.
In early 2025, the film was nominated for an Academy Award in the Best Documentary Feature Film category.
Japan Initially there was concern that the film would not be released in Japan. Co-Producer Eric Nyari stated that Japanese cinemas, "including the ones we were most hoping for," are "owned by large corporations that also own hotels," making this film "a particularly sensitive case for them." Two French organizations jointly launched a Change.org petition calling for the film's immediate release in Japan.
In an interview, Ito herself commented that Japanese distributors "know that this is not a legal issue, but they are afraid of public opinion." She added, "The people I most want to see this film are those in Japan. Criticism and debate are inevitable, but first, I just want people to watch it." The film was finally released theatrically in Japan on December 12th, 2025. For its release, Ito made changes and adjustments to address Japanese privacy concerns such as blurring some faces while preserving the substance and message of the film.
Reception Critical response Metacritic, which uses a weighted average, assigned the film a score of 82 out of 100, based on 18 critics, indicating "universal acclaim".
Manohla Dargis of The New York Times wrote, "Black Box Diaries is, at heart, a first-person account, and while it's successful on those terms, it's finally more emotionally engaging than intellectually satisfying." Richard Brody of The New Yorker wrote, "Ito unstintingly records the enormous emotional toll that the assault, the legal cases, and her pursuit of justice took on her, and she does so with an unsparingly candid cinematic sensibility." Lovia Gyarke of The Hollywood Reporter called the film "a visceral testimony of survival and recourse" and wrote, "Where Ito's film distinguishes itself is in the diaristic iPhone videos", which "reclaim the idea of testimony, changing it from a public act to an urgent and healing private one".
Nicolas Rapold of the Financial Times found the film "genuinely empowering", writing that its "mix of vérité filmmaking and audio-only interviews ... makes for a visceral account of the ups and downs of her journey". Nell Minow of RogerEbert.com found the film "intimate, achingly personal" and "a testament to her courage", giving it three and a half out of four stars. Lex Briscuso of TheWrap described Black Box Diaries as "a stunning, effective tale of reclaiming victimhood and the fight for justice" and "a selfless gift meant to show other survivors that it is possible to not only rebuild your inner sanctuary, but to seek meaningful justice".
Fionnuala Halligan of Screen Daily wrote, "Black Box Diaries is one of the discoveries of this year's Sundance film festival: it seems to encapsulate a generation's dreams and disappointments, torments and triumphs." Guy Lodge of Variety described the film as a "tightly wound, heart-on-sleeve procedural documentary". Justin Chang of the Los Angeles Times called the film "a tough, harrowing work of self-portraiture". Valerie Complex of Deadline wrote, "Precise filmmaking puts us in [Itō's] mindset through this exhausting investigation, capturing the sadness, joy and determination pushing her forward despite all momentum against her." Drew Burnett Gregory of Autostraddle wrote that the film reveals "not only the facts of her case, but the immense toll this fight takes on her life".
Filmmaker Atsushi Funahashi and historian Chelsea Szendi Schieder wrote that the film has "the subversiveness of a good documentary" in which each viewer can "understand the social phenomena depicted therein as problems that permeate the entire society", and that the hotel footage should be shown so that administrative and legislative failure can be confronted, but that the footage and audio of civilians such as the taxi driver and journalists should be authorized or obscured.
Accolades Award Date Category Recipient Result Sundance Film Festival 28 January 2024 World Cinema Documentary Grand Jury Prize Black Box Diaries The Complete List of 2024 Sundance Film Festival Award Winners|Sundance Film Festival CPH:DOX 24 March 2024 Human:Rights Award Hong Kong International Film Festival 8 April 2024 Golden Firebird Award – Documentary Competition San Francisco International Film Festival 28 April 2024 Best Documentary Feature Special Jury Award Seattle International Film Festival 27 May 2024 Best Documentary Lena Sharpe Award for Persistence of Vision Best Director Shiori Itō Cinéfest Sudbury International Film Festival 22 September 2024 Inspiring Voices and Perspectives Award Black Box Diaries "'The Count of Monte-Cristo' big winner at Cinéfest Sudbury". Sudbury.com, September 27, 2024. Zurich Film Festival 13 October 2024 Best International Documentary Film Critics' Choice Documentary Awards 10 November 2024 Best True Crime Documentary National Board of Review 4 December 2024 Top 5 Documentaries International Documentary Association Awards 5 December 2024 Best Feature Documentary Eric Nyari, Hanna Aqvilin, and Shiori Itō Best Director Shiori Itō Emerging Filmmaker Award Best Editing Ema Ryan Yamazaki Astra Film Awards 8 December 2024 Best Documentary Feature Black Box Diaries Alliance of Women Film Journalists 7 January 2025 Best Documentary Film Cinema Eye Honors 9 January 2025 Outstanding Non-Fiction Feature Shiori Itō, Eric Nyari, Hanna Aqvilin, Ema Ryan Yamazaki, Yuta Okamura, Yuichiro Otsuka, Mark degli Antoni, and Andrew Tracy Outstanding Debut Shiori Itō The Unforgettables British Academy Film Awards 17 February 2025 Best Documentary Shiori Itō, Eric Nyari, and Hanna Aqvilin Academy Awards 2 March 2025 Best Documentary Feature Film Peabody Awards 1 May 2025 Documentary Hanashi Films, Cineric Creative, and Star Sands Golden Trailer Awards 29 May 2025 Best Foreign Documentary MTV Documentary Films / Jump Cut
Controversy In October 2024 and February 2025, Itō's former legal representatives held two press conferences, claiming that video footage from Itō's film had been used without authorization and that the matter raised serious ethical concerns.
According to the lawyers, the hotel surveillance footage used in the film was obtained under an agreement with the hotel, (part 2 of 2) which stipulated that it would only be used as evidence in Itō's legal proceedings. Additionally, they pointed out several issues of the film:
The film includes footage of a key witness, a taxi driver, who had refused to testify under oath in Itō's trial, without proper source protection. Audio recordings of Ito's talk with "Detective A," a confidential source for Itō, were used without proper source protection. Conversations with some attorneys were recorded without consent and were presented in the film in a way that appeared to obstruct Itō's efforts.