I saw this at the Shin-bungeiza cinema in Tokyo. I didn't understand it all that well, but it was pretty exciting. It was certainly not a B-movie in the pejorative sense, and not too dated.
The main character is a journalist who investigates some murky goings-on. The journalist looks like a hero from a Hollywood thriller, and his heavily built and thuggish nemesis looks like a Japanese Robert Shaw.
This film is mainly interesting for the view it gives of international politics and security in Japan during the height of the Cold War.
Obviously, the title is the Japanese pronunciation of the English word "spy".
