りょうかい

• 読み: りょうかい
• ローマ字: ryokai
• 発音: /ɾʲo.ɯ.ka.i/

意味

A casual way to say 'roger,' 'understood,' or 'got it' — the go-to acknowledgment among friends and peers.

りょうかい is the casual kana spelling of 了解, stripped of its formal kanji weight. While 了解 can be used in semi-formal contexts, writing it in hiragana signals a relaxed, friendly tone. It is ubiquitous in LINE messages, group chats, and casual workplace communication among peers. Some workplaces consider even the kanji form too casual for use with superiors, preferring 承知しました instead.

例文

1. りょうかい、じゃあ7時に駅前で集合ね。
2. 明日の予定変わったんだ。りょうかい、了解。
3. りょうかい！すぐ準備するね。

使い方ガイド

場面: texting, LINE, friends, casual workplace

トーン: agreeable, brisk

正しい言い方

• りょうかい、あとで連絡するね (Got it, I'll message you later)
• りょうかい〜、ありがとう！ (Roger that, thanks!)

避ける言い方

• 上司へのメールで「りょうかい」は失礼 — 「承知しました」を使う (Using りょうかい in emails to superiors is rude — use 承知しました)

よくある間違い

• Using りょうかい with superiors or clients — it is peer-level language only
• Thinking りょうかい and 承知しました are interchangeable — the latter is far more respectful

起源と歴史

From 了解 (ryoukai), a formal term meaning 'comprehension/acknowledgment' used in military and business contexts. The casual hiragana form spread through texting culture in the 2000s as a quick, friendly acknowledgment.

文化的背景

時代: 2000s texting culture

世代: All ages (casual contexts)

社会的背景: Universal informal

地域メモ: Used nationwide. Often abbreviated further to りょ in very casual texting. One of the most common LINE/text responses in Japanese.