It seems that Kurosawa used some sort of the "stamps" during the shot period and totally forgot what he wanted to tell us (OK, OK, not to "us" - just to me). For a contrast you may see another Japanese title - "Enter the void", which itself is a one big "stamp" but is a masterpiece in, at least, its visual part. Because IMDb requires 10+ lines of review, I will add them in a quick way:
Music 3/10, despite the hero is a "music producer". Actors acting 7/10 - especially the heroine. An Idea behind the scenes - non trivial, hard to formulate. Realisation - oops, 3/10. Total 4/10. And the last line: of course, you should see it by yourself to have your own opinion and not to read such a stupid "reviews" like this one.
Music 3/10, despite the hero is a "music producer". Actors acting 7/10 - especially the heroine. An Idea behind the scenes - non trivial, hard to formulate. Realisation - oops, 3/10. Total 4/10. And the last line: of course, you should see it by yourself to have your own opinion and not to read such a stupid "reviews" like this one.