Good to hear you got a GPS fix. There have been reports about GPS not locking without a data connection (https://bugs.maemo.org/show_bug.cgi?id=7026). Since you'll be using GPS and street maps in Tokyo, and presumably without a data connection when you're on the go (no SIM and no wifi), I'd be interested in hearing if the GPS continues to work well for you or if you encounter locking problems as described in the above bug report...