It has always been a source of irritation to me that we let the Japanese slide compared to the justice we sought from the Nazis. We have former prisoners of war that are still trying to get justice after being used for slave labor by the japanese in WWII. We should be ashamed of our actions toward this country who initially bombed us and started us on the road to WWII.
We have to be pragmatic, unfortunately. Because Communist China remains the 800-lb bad guy gorilla in the region, the Japanese are the de facto good guys now. Fortunately, it's not nearly as bad a choice when we were backing Saddam's Iraq against Ayatollah Khomeini's Iran in the early '80s.