
PARK CITY, UTAH - JANUARY 20: Hanna Avqilin, Shiori Ito, and Ema Ryan Yamazaki attend the 2024 Sundance Film Festival Black Box Diaries premiere at Prospector Square Theatre. (Photo by Marc Sagliocco/Shutterstock for Sundance Film Festival)
By Stephanie Ornelas
You would think that the word funny wouldn't be used at all when talking about a story as harrowing as Black Box Diaries, but director Shiori Ito tells her story with such class and bravery - that's just the kind of person she is.
In her documentary, which premiered at Prospector Square Theatre at the 2024 Sundance Film Festival in Park City, Utah, on January 20, Ito puts a lens on herself as she embarks on a bold investigation of her own sexual assault in an attempt to bring down her high-profile abuser.
This is a film about my own rape investigation, but it's comedy. And it was all her job, she says, pointing to editor Ema Ryan Yamazaki. We wouldn't have a film if it wasn't for this editor.
Yamazaki explains that Ito didn't have any memory of her recordings and didn't go back to listen to them or watch them. So, I sat for a few months and watched everything every day, just crying and being shocked. I thought, How would I even show this to her?' Yamazaki says. But she knew she had to, and that they needed to have a conversation about it. I'm glad I was able to help tell your story, she says to Ito.
Ito already had written a memoir back in 2017, and she was ready to take on the next project: a feature documentary. But what made her want to tell her story in this way?
We obviously knew the police weren't doing a great job, she says. They just [swept] everything under the rug. When I went public and saw the reaction of society, I saw how the media are not trying to cover it. And I said, 'Well let's just do the story. Why not?' So I decided to keep documenting.
Ito explains that the hardest part for her was post-production. As a journalist, it's so taboo to talk about my own story, and I didn't know how much emotion to put in.
When asked how she went about assembling her film team, Ito explains, [Producer] Hanna [Aqvilin] came as a human shield. If you want to make a controversial film, bring [someone who is] Swedish, she laughs with the audience.
When we first started this journey, it was before Me Too. So, imagine: She was one of the first to go public in Japan, chimes in Aqvilin. Listen, I'm Swedish, so I was a little bit shocked. And we just continued to film because we knew this was important. We didn't know if this was supposed to be a film because it was so hard. But you never ever hesitated, she says to Ito. You were so determined. You never gave up, ever. And I'm so proud and amazed that you are so brave.
Ito gave a nod to producer Eric Nyari: Every time we had a difficult night, Eric made sure that I had my three glasses of wine, she smiles. Without him, this wouldn't have happened, so thank you, Eric.
We went from boxed wine to natural wine, Nyari laughs, as does the audience.
This was clearly a serious film but as Yamazaki says, I mean she's so funny, right? It's unavoidable. There's so much incredible footage, but what was left was something I felt that the world has never seen before. There were things that made me laugh, maybe when I shouldn't have, but I watched it 100 times and it still makes me chuckle, especially when you get to know her as a person. It was impossible to make this film without those moments. Because as you see today, that's who she is. Serious films can be funny too. People are complex, and I think films can [also] be that way.
As the documentary progresses, viewers witness Ito's story become a landmark case in Japan, as she works to expose the country's outdated judicial system. And what helped her get through it was knowing that she had a community behind her.
Even my own community, my own family, my own circle of friends in Japan were not ready for this. But I knew that a place like Sundance exists. I always say there's another world who will always stand with you, who will always believe you.
To see more from the 2024 Festival, click here.
More from Sundance Institute
11/06/2026
Laura Dern at the 1986 Sundance Institute Directors Lab (Photo by Eric Edwards)
By Lucy Spicer
It takes a village to bring together the Sundance Institute lab...
10/06/2026
A still from The Doom Generation by Gregg Araki (Courtesy of Sundance Institute)
By Lucy Spicer
Have you checked out our Sundance Film Festival 101 list yet...
04/06/2026
New global program empowers and supports storytellers through scriptwriting course and access to industry experts
TikTok and Sundance Institute today announce...
03/06/2026
Retrieval still courtesy of Tribeca.
By Jessica Herndon
This year, the Tribeca...
02/06/2026
Olivia Wilde, Seth Rogen, Pen lope Cruz, and Edward Norton appear in The Invite by Olivia Wilde, an official selection of the 2026 Sundance Film Festival. (Co...
28/05/2026
By Gina McIntyre
(L-R) Sara Dosa and Andri Sn r Magnason attend the Time and Water premiere during the 2026 Sundance Film Festival at Library Center Theatre ...
21/05/2026
Heather Matarazzo as Dawn Wiener in Todd Solondz's Welcome to the Dollhouse...
19/05/2026
By Jessica Herndon
The line wrapped around the building outside Denver's La...
18/05/2026
(L-R) Midori Francis and Natalie Erika James attend the Saccharine premiere during the 2026 Sundance Film Festival at The Ray Theatre on January 22, 2026, in ...
15/05/2026
Daniel Roher attends the Tuner Premiere during the 2026 Sundance Film Festival at Eccles Theatre on January 22, 2026 in Park City, Utah. (Photo by Neilson Bar...
14/05/2026
LOS ANGELES, CA, May 14, 2026 - The nonprofit Sundance Institute announced today the cohort selected for the 2026 Episodic Lab program, taking place at Dunaway ...
12/05/2026
A still from Past Lives by Celine Song, an official selection of the Premieres program at the 2023 Sundance Film Festival. (Courtesy of Sundance Institute | p...
08/05/2026
Molly Gordon and Ben Platt appear in Theater Camp. (Courtesy of Searchlight Pictures)
By Lucy Spicer
Her character is the beloved founder of the AdirondACTS...
02/05/2026
(L-R) Dustin Hoffman and Leo Woodall appear in Tuner by Daniel Roher, an official selection of the 2026 Sundance Film Festival. (Photo courtesy of Sundance In...
01/05/2026
By Bailey Pennick
One of the most exciting things about the Sundance Film Festi...
29/04/2026
(L-R) Derek Drescher, Coss Marte, and Syretta Wright have each other's backs. (Micheal Hurcomb/Shutterstock for Sundance Film Festival)
By Veronika Lee Cla...
24/04/2026
Championing documentaries that illuminate and expand the artform is at the core ...
24/04/2026
The Peabody Awards spotlight excellent work that endures. This year's winner...
21/04/2026
Rashad Frett attends the 2025 Sundance Film Festival premiere of Ricky at Eccles Theatre on January 24, 2025, in Park City, UT. (Photo by George Pimentel/Shut...
10/04/2026
The Peabody Awards don't just recognize great storytelling, they spotlight t...
09/04/2026
15 feature films, including fiction and documentaries, along with six short film...
08/04/2026
Seven Fellows Selected for Second Year of Residency in Honor of Social Justice L...
07/04/2026
LOS ANGELES, CA, April 7, 2026 - The nonprofit Sundance Institute announced today the fellows selected for the 2026 Native Lab, the signature initiative of the ...
02/04/2026
(L-R) Molly Belle Wright, Wyatt Solis, and John Magaro appear in Omaha by Cole Webley, an official selection of the 2025 Sundance Film Festival. (Photo courte...
27/03/2026
By Lucy Spicer
One of the most exciting things about the Sundance Film Festival...
25/03/2026
(L-R) Charlie Tyrell and Daniel Roher attend The AI Doc: Or How I Became An Apocaloptimist Premiere during the 2026 Sundance Film Festival at The Ray Theatre ...
23/03/2026
16 Science-Focused Nonfiction Projects Selected for Funding
LOS ANGELES, CA, March 23, 2026 - The nonprofit Sundance Institute and Sandbox Films announced toda...
20/03/2026
By Jessica Herndon
One of the most exciting things about the Sundance Film Fest...
18/03/2026
(L-R) The cast and crew of Dead Lover at The Ray Theater for its premiere at the 2025 Sundance Film Festival. (Photo by Robin Marshall/Shutterstock for Sundan...
16/03/2026
A still from Mr. Nobody Against Putin by David Borestein and Pavel Talankin, a...
12/03/2026
By Jessica Herndon
We love kicking off each year by introducing the world to po...
12/03/2026
Samrat Chakrabarti, George Basil, Kiran Deol, Katie McCuen and Vishal Vijayakumar attend the 2025 Sundance Film Festival premiere of Didn't Die at the Lib...
05/03/2026
Barbara Hammer appears in Barbara Forever by Brydie O'Connor, an official se...
04/03/2026
sldkfjsdlfkjsldkfjsldkjfslkdjfslkdjfsl
Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut elit tellus, luctus nec ullamcorper mattis, pulvinar dapibus...
03/03/2026
From April 30 to May 3, Sundance Film Festival: CDMX 2026 will offer a selection of exciting independent cinema.
Mexico City, March 3, 2026 - At a moment of he...
24/02/2026
Official Venues Unveiled for Festival's Milestone Colorado Debut in 2027...
20/02/2026
(L-R) Writer-director Amanda Kramer photographs the photographers at the premiere of her film By Design at the Library Center Theatre in Park City. (Photo by ...
17/02/2026
Sophie Hyde and John Lithgow backstage during the premiere of Jimpa. (Photo by George Pimentel / Shutterstock for Sundance Film Festival)...
16/02/2026
The Film Independent Spirit Awards have officially switched things up. This Sund...
13/02/2026
By Jessica Herndon
We may have just wrapped an unforgettable 2026 Sundance Film...
13/02/2026
By Jessica Herndon
One of the most exciting things about the Sundance Film Fest...
04/02/2026
Olivia Colman and John Lithgow appear in Jimpa by Sophie Hyde, an official selection of the 2025 Sundance Film Festival. (Courtesy of Sundance Institute | pho...
30/01/2026
Top L-R: The Friend's House is Here, Josephine, The Lake, Bedford Park, Who Killed Alex Odeh?
Second Row L-R: Take Me Home, American Pachuco: The Legend of...
28/01/2026
Top L-R: The Liars, Jazz Infernal, Living with a Visionary
Second Row L-R: Paper Trail, The Baddest Speechwriter of All, Crisis Actor
Third Row: The Boys and ...
27/01/2026
L-R: Jonathan Cuchacovich, Sonia Kennebeck, Alan Fischer, Daeil Kim, Andrew Sta...
24/01/2026
Masami Kawai Selected as the 2026 Merata Mita Fellow; Isabella Madrigal and Tsanavi Spoonhunter Named 2026 Graton Fellows During Native Forum Celebration in Par...
22/01/2026
By Jordan Crucchiola
It's a desire you hear so often among those in filmmaking circles. I just want to make cool stuff with my friends. With the NEXT selec...
22/01/2026
Brittany Shyne attends the 2025 Sundance Film Festival premiere of Seeds at The Ray Theatre on January 25, 2025, in Park City, UT. (Photo by Robin Marshall/Sh...
22/01/2026
Joel Edgerton and Felicity Jones appear in Train Dreams by Clint Bentley, an off...
20/01/2026
The Gotham, Film Independent, and Creators Coalition on AI Join Alliance
by Michelle Satter, Founding Senior Director, Sundance Institute's Artist Programs...