出会い系

• Reading: であいけい
• Romaji: deai kei
• Kanji breakdown: 出 (go out) + 会 (meet) + い (connective) + 系 (type/category) → encounter-type service
• Pronunciation: /de.a.i ke.i/

Meaning

A hookup or dating site/app, often carrying a slightly shady or sleazy connotation compared to modern dating apps.

出会い系 originally referred to early Japanese dating websites from the early 2000s, many of which were associated with scams, catfishing, and compensated dating. While some legitimate services existed, the term retained its negative stigma. Today, people distinguish between the respectable マッチングアプリ and the older, shadier 出会い系.

Examples

1. 出会い系ってちょっと怖いイメージあるんだよね。 Hookup sites have kind of a scary image, you know?
2. あの人、出会い系で知り合ったらしいよ。 Apparently that person met someone through a hookup site.
3. 昔は出会い系しかなかったけど、今はマッチングアプリがあるから安心。 Back in the day there were only sketchy dating sites, but now there are legit dating apps so it's much safer.

Usage Guide

Context: friends, casual conversation, gossip

Tone: slightly negative, cautious

Do Say

• 出会い系はちょっと怖いからマッチングアプリにした。 (Dating sites seem a bit sketchy so I went with a dating app instead.)
• 出会い系ってまだあるの？ (Do those hookup sites still exist?)

Don't Say

• マッチングアプリを出会い系と呼ぶと嫌がられる (Calling someone's dating app a 出会い系 can offend them — it implies the shadier kind)

Common Mistakes

• Using 出会い系 and マッチングアプリ interchangeably — the former has a much more negative connotation

Origin & History

From 出会い (encounter/meeting) + 系 (type/category). Emerged in the early 2000s with the rise of online dating websites in Japan. The term carries lingering stigma from early sites associated with scams and illegal activity.

Cultural Context

Era: Early 2000s, peak stigma mid-2000s

Generation: Known by all ages, but the term itself feels dated to younger speakers

Social background: Carries class/safety stigma

Regional notes: Used across Japan. The negative connotation is nationwide.