Droneklax, good advice. The same thing happened to me a while back, after arriving in Narita. I decided to get cash at an ATM before I left the terminal. The upside-down keypad took me aback. I knew my PIN by pattern, but had little confidence I knew the numbers. So, (and this is embarrassing), I slowly traced the pattern out on the keypad, juxtaposing the keys in my head to figure out the numbers, which I then carefully keyed in!