William here with a word about water. Kumamoto is the largest city in the world to be served entirely by artisanal water. The granite substrate created by repeated Aso eruptions ensures that fresh water remains towards the surface. The water from your tap is far superior than anything you can buy at a store. (My sister, visiting from the States, once sent me out to get her a bottle of water, and the clerk looked at me as if I were insane.) I fill up a pet bottle with tap water nightly, stick it in the fridge, and drink it the next day. Stay hydrated.