Where am I?

[__5hin]

I seem to have gotten on the wrong bus -- several wrong buses and a boat -- and now I'm in some place called 'Okinawa'.

I had to trade my bag of supplies at a pawn shop for some money for train fare. Pity, since I'd found some very interesting tools.

Nephew, would you help your dear old Uncle out? Or at least give me some directions as to how to get back.