http://money.cnn.com/2017/03/22/news/japan-vending-machines/index.html
Sales drop of vending machines may be affected by supermarkets or convenience stores, where cans or bottles of drink are sold at comparatively cheaper price.
But, it is difficult to discount them due to higher cost of labor.
So, it's better to launch vending machines away from convenience stores and supermarkets in demanded area.
For example, bank of river, sports center, around which, there are no facilities.
