noun
business region; marketing area; commercial sphere; trading area
Refers to the geographic area from which a business draws customers or within which it operates. Common in retail, marketing, and economic contexts.
新しい店舗の商圏を調査する。
We survey the trading area for the new store.
この地域は人口が多く、商圏として有望だ。
This area has a large population and is promising as a commercial sphere.
Compound of 商 (commerce, trade) and 圏 (sphere, area). The term is a relatively modern coinage for business geography.