There's a lot to like about this film, mostly because of the beautiful cinematography and the picturesque Japanese countryside. The unraveling of the police investigation of the central murder has interesting moments, but by the end it becomes too strung-out and torturous. The last 45 minutes or so had me tapping my toes waiting for it to end, as every plot point and every shot was prolonged far past the limits of my patience.
Lovers of classical music will be amused by what passes for the output of the "genius" composer. While composing in the early stages in his home at the piano, he plays quite awful nightclub music. It would never get him an invitation to perform with the New York Philharmonic, as the plot requires. In the last section, with him performing on stage, intercut with scenes of the police concluding their investigation, he plays a pretty forgettable late-Romantic piano concerto, apparently written by a real Japanese composer, Yasushi Akutagawa.
