Chances are, you've probably wandered into a Don Quixote already, whether you're visiting Tokyo or living here. DQ is a super-store... there's no American equivalent to it (maybe Walmart)...it's almost cluttered, selling everything. It's a drugstore (medicine, toys, stationary, food) w/ a larger household electronics selection for fairly reasonable prices, esp. if it's on sale. DQ is a convenient one-stop-shop, but expect to pay a teeny bit more if the item's not on sale.