同接

• Reading: どうせつ
• Romaji: dōsetsu
• Kanji breakdown: 同 (same/simultaneous) + 接 (connect) → simultaneous connections, i.e. concurrent viewers
• Pronunciation: /doː.se.tsu/

Meaning

Abbreviation of 同時接続 — the number of concurrent viewers watching a livestream at the same time.

同接 (dōsetsu) is short for 同時接続数 (dōji setsuzoku sū, simultaneous connection count). It is the primary metric for measuring a livestream's popularity in real time. Streamers and fans closely track 同接 numbers, and hitting milestones (1万同接, 10万同接) is cause for celebration. The term is used as both a noun ('同接すごい' — amazing viewership) and with numbers ('同接5万' — 50K concurrent viewers). It is a key status indicator in streaming culture.

Examples

1. 昨日の配信、同接3万いってたらしいよ。 Apparently yesterday's stream hit 30,000 concurrent viewers.
2. 同接がどんどん増えてきて配信者も興奮してた。 The concurrent viewer count kept climbing and even the streamer was getting hyped.
3. 深夜なのに同接1万超えてるのすごくない？ Isn't it wild that they've got over 10,000 concurrent viewers this late at night?

Usage Guide

Context: streaming, YouTube, VTuber, social media

Tone: analytical, excited

Do Say

• 同接どれくらい？ (How many concurrent viewers are there?)
• 同接10万突破おめでとう！ (Congrats on breaking 100K concurrent viewers!)

Don't Say

• 配信と関係ない文脈で同接を使う (Don't use 同接 outside of streaming context — it's streaming-specific jargon)

Common Mistakes

• Confusing 同接 (concurrent viewers) with total views or subscriber count — 同接 is specifically real-time viewers
• Not knowing that 同接 fluctuates throughout a stream and peak 同接 is what people typically brag about

Origin & History

Abbreviated from 同時接続 (dōji setsuzoku, simultaneous connection). A technical broadcasting term adopted into casual streaming vocabulary in the mid-2010s as livestreaming became mainstream in Japan.

Cultural Context

Era: Mid-2010s onward, with livestreaming boom

Generation: Millennials and Gen Z

Social background: Streaming community

Regional notes: Used across Japan in streaming circles. A key metric in the Japanese streaming industry alongside スパチャ amounts.