Reged: 02/28/06
Posts: 641
Loc: Sheffield, England
...probably won't work over there? Very, very few American or British cellphones work in Japan - they use comletely different networks and technologies. A colleague told me all about this last year. He rented one from a stand at the airport for the duration of the visit - good idea.
He also told me about a great site to find out about going to Japan (because at one point I was supposed to be making a trip), it covers just about EVERYTHING - the power adaptors you'll need to take, essentials to take, transport over there, the airport, etc etc. Link below.