One of the nicest stuff in Japan must be the handiness of its convenience stores.
Needless to say, most of them are open around the clock, so you can buy almost all daily necessities you need. Many of them have not only cash dispensers but also copying machines, fax machines. Then there are microwave ovens and hot water dispensers, so you can warm your packed lunches and pour hot water into your Cup Noodles that you buy at the store.
Above all, that they serve you their toilets is worthy of special mention. Of course it depends on the store, but basically the toilets are always kept clean, and everyone can use it without any compensating purchases. Maybe the Japan's low crime rate can it possible.
These days, almost all newly built convenience stores tend to exhibit their convenience with their explicit signboards.