[timelesssymphony]

forget the post office, 7-11's are everywhere and their 7-bank ATM's accept foreign cards, are open 24/7 (unlike most ATM's including they post office, which have a tendency to have operating hours.. they are getting better though), The 　えいごがはなしますか question being offensive would be a first for me, a more polite way would be do you understand English, using Wakarimasuka instead of speak, especially in Tokyo they are used to lost Gaijin especially in the station. Also even though it is unlikely that you will be robbed or mugged I would not go as far as to say you will not be, I could link a half dozen news paper articles on such a thing but my point should be enough, never say never.