Momma won't get any resistance from me Boss. Truth is, for the first twenty five years of my life, some of my very best friends were Japanese. One played an entire football game on some kind of broken leg (can't remember which bone after all these years) and never said a word about it, until the game was over.
I have nothing but respect for the Japanese people, and how they have evolved since WWII. My father-in-law was called to Tokyo and honored for his humane treatment of captured Japanese military officers, in the Philippines. He was covered in scars from hand to hand knife fights in the fox holes of the Philippines with them, and came home determined to see the goodness in the Japanese people, and did.
In the last sixty years the Japanese have demonstrated they are a brilliant and peace loving people. It just goes to show you what nasty leaders can do to their people, if left unchecked.
I hope you grandson has a safe and wonderful trip, he sounds like a young man that has a great future to look forward to.
DC
