Kon-bini: 24-hour convenience store
These are five popular 24/7 stores, called convenience store in Japan and now such stores is everywhere in Tokyo. One of the biggest chain stores, Seven Eleven come from US and the other, Lawson, Family Mart, am pm and Sunkus are Japanese. We can buy a variety of stuffs, from daily foods and beer to stationery and magazine. Plus, we can book some concert and hotel and can send stuffs via delivery service like Fedex and DHL. Most of stores let us use small washing room.
By the way, I prefer Seven Eleven and am pm.