online dating website; online dating service
Abbreviation of 出会い系サイト. Refers to websites or services designed for meeting people, often with romantic or sexual intent. Commonly used in contexts discussing internet safety and regulations.
See also: 出会い系サイト
Meeting someone you got to know through an online dating site can be dangerous.
この出会い系は18歳未満は利用できない。
This online dating service cannot be used by people under 18.
online dating website
Abbreviation of 出会い系サイト (deai-kei saito, 'encounter-type site'). The term became common in the early 2000s with the rise of internet dating in Japan.