I work as a Play Place ranger at a McDonald's (along side with being a cashier etc)and I really thought at first that that would deter me from like kids so much because I would have to clean up after them and because of how fast they go allthetime. It ended up that it's helped me like little ones even more! :) Besides, I'd always be worried about older kids' tendencies to have bad attitudes. :/ Not all but I've noticed a lot.
:D That sounds like it would be so neat! Japan is a place I wouldn't mind visiting sometime, I'm not sure if I could live there though.