I'm curious to find out about whether people having experience riding the bike in Tokyo are comfortable riding either on the sidewalk, or the roadway.
I've set up a poll in the forum, to find out.
http://cycle-tokyo.cycling.jp/forum/cgi-bin/ikonboard.cgi?act=ST;f=3;t=11
Please send in your 5 cents, of course it would be subjective, and can be a first hand view.