a warning to busy IETFers: your GSM cellphones WILL NOT WORK in Japan. - GSM is NOT in service in Japan, at all. - CDMA is in service in Japan, however, make sure to check if your cellphone provider has a roaming option to Japan. (my CDMA phone can roam to major cities in the US, Korea and several other regions, but I can't tell if the opposite is possible) http://www.wide.ad.jp/ietf54/localinfo.html has a link to a list of cellphone rental companies. they hands out phones at NRT, so reserve one before you fly. (note: I don't mean to recommend any of rental companies, and I don't have any info on which is good/bad) itojun