Most critics find Black Box Diaries absorbing and emotionally forceful, with praise centred on Itō’s first-person footage and her persistence in seeking justice. The diary recordings give the investigation a private, human dimension, showing the psychological cost of her public struggle. The reviews also value the film’s account of institutions failing survivors, while several praise the editing for shaping investigative material and intimate moments into a clear, compelling narrative.
The available verdicts range from enthusiastic endorsement to more qualified approval, with reservations focused on investigative technique rather than the value of Itō’s testimony. IndieWire finds some investigative sequences awkward and amateurish, despite the strength of the personal footage. The Guardian wants a more precise explanation of how pivotal hotel CCTV footage is obtained. These are limited objections within a broadly favourable consensus; the inaccessible reviews do not provide enough evidence to identify a substantive dissenting position.
