The film is available on Netflix in several regions with multi-language subtitle options.
You can also find it on Rakuten Viki, which often features fan-contributed community subtitles. subtitle My.Broken.Mariko.2022.JAPANESE.WEBRip....
The story follows Tomoyo Shiino, an office worker who discovers her best friend, Mariko, has committed suicide. In a final act of devotion, Tomoyo steals Mariko's ashes from her abusive family to take her on one last journey to the sea—a trip they never got to take together while Mariko was alive. The film is available on Netflix in several