also: こかくそう
noun
customer base; clientele; customer segment
Refers to the demographic or behavioral segment of customers a business serves. Often used in marketing and business contexts.
当店の主な顧客層は20代の女性です。
Our store's main customer base is women in their twenties.
新商品は若い顧客層をターゲットにしている。
The new product targets a younger customer segment.
Compound of 顧客 (customer) and 層 (layer, stratum, segment).