mass retailer; volume seller; big-box store
Refers to a store that sells large quantities of goods at low prices, such as electronics, appliances, or general merchandise. Often used for chains like 家電量販店 (consumer electronics mass retailer).
You can get a TV cheap at that mass retailer.
A new consumer electronics mass retailer opened in front of the station.
I bought a new refrigerator at a big-box store.
A major mass retailer opened a store in front of the station.