You can't inhibit a desire to see other parts of the US/World. That in itself is worth something, no matter the institute he wants to go to. Him doing a semester abroad in Japan will further that goal even more so. I'm glad you aren't getting in the way of those desires. My parents supported my travels abroad, and I'm ever so grateful to them. I saw things I would have never experienced here in Tulsa. It has influenced my life and opened my mind in ways I never could have, if I stayed here. College is the perfect time for this to happen. If he was in Boston all his life, I would say the same thing if you wanted him to go to Boston U, and he was interested in the University of Tulsa. Going somewhere for a visit is not the same thing as living there.