Brilliant slow burning suspense horror that builds up to a satisfying climax. It's not particularly scary in the jumpscare sense but the entire movie has this sense of urgency and dread. Reminds me more of a thriller with horror elements as the mystery unfolds against the ticking clock.

The choice to change the lead from the novel to female was probably a smart move and Matsushima Nanako is fantastic in the role. Her desperation and intense performance really propels the movie in a way I'm not sure would have worked without her.

The film locations and music all create a really atmospheric experience and there isn't much else to say that probably hasn't been said a hundred times. Great movie.