[Polar]

I would echo MMM

Two weeks is more then enough, will you see everything ? No, but you will see everything you wanted to in two weeks. I know I did.

If your talking $2K for spending money you will be more then covered. I was there for two weeks in March and spent less then 1K on food, video games etc..

Take advantage of the "lunch set" prices 800 - 900 yen, every place has them and they go 7 days a week.