ＥＣサイト

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Meanings

1

noun

e-commerce website; online shopping platform

Refers to any website or platform where goods or services are sold online. Common in business and everyday contexts.

ネットショップ
More casual and general term for an online shop; ネットショップ can refer to smaller or individual stores, while ＥＣサイト often implies a larger commercial platform.
通つう販はんサイト
Literally 'mail-order site'; emphasizes the catalog/mail-order origin, but in modern usage it is largely synonymous with ＥＣサイト.

From English 'EC' (electronic commerce) + 'site'. The abbreviation EC is widely used in Japanese business terminology.