非常識

• 読み: ひじょうしき
• ローマ字: hijōshiki
• 漢字の分解: 非 (non-/un-) + 常識 (common sense) → lacking common sense
• 発音: /hi.dʑoː.ɕi.ki/

意味

Lacking common sense, socially unacceptable behaviour — one of the harshest everyday criticisms in Japanese.

The opposite of 常識, being called 非常識 is a serious social indictment in Japan. It means you have violated the unwritten social codes that everyone is expected to follow. Unlike a simple mistake, 非常識 implies a fundamental failure to understand how society works. It is used for everything from minor social faux pas to genuinely outrageous behaviour, and is one of the most cutting everyday insults.

例文

1. 電車の中で大声で電話するなんて非常識すぎる。
2. 非常識な人って自覚がないからタチが悪い。
3. 深夜に掃除機かけるとか非常識にもほどがある。

使い方ガイド

場面: everyday conversation, neighbourhood disputes, social media

トーン: judgmental, indignant

正しい言い方

• あの行動は非常識だと思わない？ (Don't you think that behaviour is beyond the pale?)
• 非常識な客が増えてサービス業は大変だ (With more rude customers, the service industry has it rough)

避ける言い方

• 文化の違いを「非常識」と決めつけない (Don't label cultural differences as 'lacking common sense')

よくある間違い

• Underestimating how harsh 非常識 sounds — it is a stronger criticism than the English 'rude' or 'inconsiderate'
• Applying Japanese 常識 standards to people from different cultures and calling them 非常識

起源と歴史

Direct negation of 常識 (common sense) using the prefix 非 (non-). As 常識 became a powerful social enforcement tool, 非常識 became one of the strongest everyday criticisms of social behaviour.

文化的背景

時代: Timeless, reflects Japan's strong social code system

世代: All ages

社会的背景: Universal

地域メモ: Used across all of Japan. A cornerstone of Japanese social criticism and one of the most common complaints.