Akihabra train station.
The scales do everything but Skype with your nutritionist.
We were in Akihabra because hubby wanted a new Canon Wordtank electronic dictionary. While he shopped, the rest of us walked through aisles and aisles of the latest gadgets for office/home, kitchen, and bathroom.
During the week, you have to dodge traffic and crowds to cross the street in Akihabra. On Sundays, the main street is turned into a pedestrian mall. If you're in Tokyo, this is a must-see area!