Convenience stores (コンビニエンスストア), better known as konbini (コンビニ), are very popular in Japan. Most of them are open 24/7 and offer a variety of goods, from food to deodorant to even white buttoned shirts with necktie. It is the perfect place to buy simple Japanese food like onigiri, or anything else you need really.
You will find a small place to eat or rest inside in most places, and there are also restrooms. Outside of most convenience stores are big recycle bins where you can throw away your trash. Do not throw random trash in them as these bins are meant to throw convenience store garbage. There are usually signs that prohibit people from throwing house trash inside.
On top of having many different goods, Japanese convenience stores offer a number of services. Depending on the place, you can find copy / fax machines and ATM’s. You can also send certain parcels there from stuff you sold on Yahoo Auction or Mercari, and it is even possible to make bank payments for gas, water, electricity, and other types of bills.
The most commonly seen and popular stores are: 7-Eleven, FamilyMart, Lawson, Ministop, and Daily Yamazaki.