I do like Japanese cinema a lot. One of the problem is they make some movies in many different versions. This one I have seen before I do not remember from what yea but a shorter and better version.
This version is simply too long. Besides that all actors including the lead Tatsuya Nakadai delivers a less than engaging performance. It may very well be the director that is the problem since everything in this movie is so dull. It does take nearly 50 minutes before things do get interesting. And then it is too late to save the movie.
I would recommend try another and shorter version