ダイエット

• 読み: ダイエット
• ローマ字: daietto
• 漢字の分解: From English 'diet' → katakana adaptation ダイエット (meaning narrowed to weight loss in Japanese)
• 発音: /da.i.et.to/

意味

Diet; losing weight through food restriction, exercise, or lifestyle changes.

In Japanese, ダイエット almost exclusively means 'losing weight' or 'going on a diet,' unlike English where 'diet' can neutrally refer to one's regular eating habits. It's one of the most ubiquitous health and beauty terms, appearing constantly in magazines, TV shows, and social media. Japan has a massive diet industry with new trends appearing every season — from specific food diets to exercise methods.

例文

1. 夏までにダイエットしなきゃ、水着着れない。
2. ダイエット中だけど、このケーキだけは食べていい？
3. 今年こそダイエット成功させるって毎年言ってる。

使い方ガイド

場面: daily conversation, social media, beauty, health

トーン: casual, determined, sometimes self-deprecating

正しい言い方

• ダイエット始めたから甘いもの控えてるの。 (I started a diet so I'm cutting back on sweets.)
• 無理なダイエットは体に悪いよ。 (Extreme diets are bad for your health.)

避ける言い方

• 痩せてる人に「ダイエットしなよ」は絶対NG — ボディシェイミングになる (Never tell a thin person 'you should diet' — it's body shaming)

よくある間違い

• Using ダイエット to mean your regular eating habits (like English 'diet') — in Japanese it specifically implies trying to lose weight

起源と歴史

From English 'diet,' but narrowed in Japanese to specifically mean weight loss or calorie restriction. Has been a mainstream Japanese word since the 1960s-70s, when Western health and beauty concepts were widely adopted.

文化的背景

時代: 1960s-70s adoption, universally used since

世代: All ages

社会的背景: Universal

地域メモ: Used across all of Japan. Japan's diet industry is enormous, with new trends appearing seasonally (バナナダイエット, 糖質制限, etc.).