noun
A somewhat formal or businesslike term for a person who buys something, often used in commercial or economic contexts.
この商品の主な購買者は若い女性です。
The main buyers of this product are young women.
買い手 is a more general and everyday term for 'buyer', often used in contrast to 売り手 (seller).
Compound of 購買 (こうばい, 'purchasing') + 者 (しゃ, 'person').