カスタマーkasutamaa

1. nouncustomer

• Synonymお客様おきゃくさまFormalThe politest way to address a customer, used face-to-face in the service industry; 「カスタマー」 appears mainly in service names like 「カスタマーサポート」.
• Synonym買い手かいてNeutralThe buying side in a transaction, the opposite of 「売り手」; 「カスタマー」 is a general word for a business's customers.
• Synonym客きゃくNeutralThe most basic term, covering visitors as well as customers; 「カスタマー」 refers only to customers in a commercial sense.
• Synonym顧客こきゃくWrittenUsed in writing and business contexts for a company's customers, new or existing, as in 「新規顧客」; 「カスタマー」 mostly appears as the first element of compounds.
• Synonym得意先とくいさきWrittenA long-standing regular customer, used mostly for business-to-business dealings; 「カスタマー」 does not imply a long-term relationship.
• Synonym依頼者いらいしゃWrittenSomeone who commissions work, e.g. from a lawyer or detective; 「カスタマー」 is a person who buys goods or services.
• SynonymクライアントNeutralThe client of professional services such as lawyers or ad agencies; 「カスタマー」 leans toward the ordinary consumer.
• Synonymお客さんおきゃくさんCasualMore casual than 「お客様」 and common in everyday speech; 「カスタマー」 is not used to address people directly.
• Synonym依頼人いらいにんWrittenSynonymous with 「依頼者」: someone who commissions work, mostly in lawyer or detective contexts; not used for ordinary shopping.
• Related取引先とりひきさきWrittenA written word for a party you do business with — a company or sole proprietor, suppliers included; 「カスタマー」 covers only the buying side.

Address customers directly with 「お客様」; use 「顧客」 in business writing and 「取引先」 or 「得意先」 for companies you deal with. 「カスタマー」 itself appears mostly in names like 「カスタマーサービス」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 顧客こきゃく、取引先とりひきさき、得意先とくいさき。