鍵垢

• 読み: かぎあか
• ローマ字: kagi aka
• 漢字の分解: 鍵 (kagi, key/lock) + 垢 (aka, internet slang for account, from アカウント) → locked account
• 発音: /ka.gi.a.ka/

意味

A private or locked social media account where posts are only visible to approved followers.

A compound of 鍵 (kagi, 'lock/key') and 垢 (aka, internet slang for 'account,' borrowed from the kanji meaning 'grime' because アカウント shortens to アカ). Setting an account to private is called 鍵をかける ('locking it'). Users often switch to 鍵垢 after 炎上, to avoid アンチ, or simply to limit their audience to close friends. The opposite is 公開垢 (kōkai aka, public account).

例文

1. 鍵垢にしたから知り合いしか見れないよ。
2. あの人鍵垢だからフォローリクエスト送らないと見れない。
3. 炎上してから鍵垢にする人多いよね。

使い方ガイド

場面: Twitter/X, Instagram, social media

トーン: descriptive, informational

正しい言い方

• 鍵垢にしてるから安心して投稿できる。 (I can post without worry since my account is private.)
• あの人鍵垢だよ。 (That person's account is locked.)

避ける言い方

• 鍵垢の内容をスクショして公開する (Don't screenshot and share content from a private account — it's a serious breach of trust)

よくある間違い

• Not realizing 垢 (aka) means 'account' in internet slang — it literally means 'grime' but is used as a pun on アカ (account)
• Assuming 鍵垢 content is truly private — approved followers can still screenshot and share

起源と歴史

Compound of 鍵 (kagi, key/lock) and 垢 (aka, account). 垢 became internet slang for 'account' because アカウント (akaunto) abbreviates to アカ, which is a homophone of 垢. Common since the early 2010s on Twitter.

文化的背景

時代: Early 2010s with Twitter's growth in Japan

世代: Millennials and Gen Z

社会的背景: Social media users

地域メモ: Used across Japan. Japanese Twitter users frequently switch between public and private accounts depending on circumstances.