buying habit; purchasing habit
Refers to a person's or group's habitual patterns when buying goods or services. Often used in marketing and consumer behavior contexts.
Analyze consumers' buying habits.
Buying habits have changed with the spread of online shopping.
消費行動 (consumer behavior) is a broader term covering all aspects of consumption, while 購買習慣 focuses specifically on habitual purchasing patterns.
Compound of 購買 (こうばい, 'purchasing') and 習慣 (しゅうかん, 'habit').