When we used to wanna have a cup of coffee on the street, there’re basically two ways (cafe or vending machine) in Japan a little before.
But we’ve recently got the another way for that in any convenience store (we call it “konbini” for short), and I do recommend it for particularly overseas who tend to come to mind major cafes like Starbucks for the first choice.
It could be nothing to want more except for cheapness, tastiness and convenience
The way to have a cup of coffee in a convenience store is very easy and simple although it’s a bit different depending a store you choose.
Most of the cases, you go to the checkout counter (just beside the entrance) to tell a shop staff to have your coffee (size, type, etc.,) and pay in advance.
The price is from 100 Japanese yen which means you only pay one 100 coin.
Just for reference, 1 US dollar is about 120 Japanese yen at a current rate. (09.19.2015)
If you buy a cup of coffee at any cafe, it usually costs more than 200 yen at least.
At last, there’re three representative convenience stores named 7-Eleven, Lawson, and FamilyMart in Japan.
One of the reason we can get something good quality one is their competitiveness for a long time.
It might be interesting to compare those differences with your sensitive tongues.