I would have initially said it was a tad obscure...
in reply to a message by namebug
But then I thought of my friend Rachel Hisae. She's half Irish and half Japanese, but doesn't look Japanese in the least. I suppose that since it's a middle name it really doesn't matter much anyway, but it made me rethink my answer. I agree with Caitlin that Ai would be a bit much for a first name, but the others are fine. I personally adore Japanese names, they and their meanings are beautiful. I just wouldn't use them in the first name spot.