I voted for
Black Rain, but would be happy with either selection.
If anyone is interested most may know of the excellent film adaption of
The Spy Who Came in from the Cold; starring Richard Burton in a wonderful performance.
There is also a film adaption of
Black Rain out there (not to be confused with a pedestrian police drama of the same title, but also set in Japan), though the
Black Rain film may be harder to get a hold of.