I don't begrudge WW II vets any of their hatred towards the Japanese. However, my dad's generation came after that, and he was able to make some good friendships. One of my best friends in elementary school- his dad was a U.S. Marine Sgt., while his mom was Japanese- she worked at a Commissary on a Japanese base during WW II.
The only Japanese I personally know now are Christians. One was a Kamikaze pilot (his personalized license tags spelled "KamKaze"). He was a 12 year old who was scheduled to dive a fighter into American troops when we invaded the home islands...Hiroshima and Nagasaki saved his life. A few years later, he went to a Tent Revival and accepted Christ as his Lord and Savior. He later became a Minister, a U.S. citizen, and his son fought for the U.S. Army in the Gulf War. Also, I loved when old WW II veterans would come up and hug him- realizing how much hatred there was between the Americans and Japanese, yet that Christ had reconciled the two groups.
Douglas MacArthur was asked how many troops he needed for the occupation. He replied that he only needed 5,000 Missionaries....if only we had done that.