By everyone I mean just about anyone older than ten. Here's a picture of a street vendor's stall with cell phones. Alas, the prices are about the same as in the US for most of the computer equipment, except that there is a thriving market in used equipment. Used Voodoo boards. At about 100 Yen to the Dollar it's an easy enough conversion.
Used equipment comes with a one year warranty from the store.
This particularly electronics store has a good reputation for honoring warranties. Some places will haggle on prices. I found sudden discounts when I expressed interest then walked away from some kiosks, but not in the major stores. Anyway, I have a lot to do. Lots more later.