Some Japanese words look similar to each other — or to English words — but mean completely different things. These “false friends” and near-homonyms are a constant source of embarrassing mistakes. Here are the most important ones to know.
| Pair | Word 1 | Word 2 | Key Difference |
|---|---|---|---|
| 病気 vs 気分 | びょうき (sick/ill) | きぶん (feeling/mood) | Medical condition vs emotional state |
| 大人 vs 大きい | おとな (adult) | おおきい (big) | Person vs size |
| 怖い vs 可哀想 | こわい (scary) | かわいそう (pitiful) | Fear vs sympathy |
| 可愛い vs 可愛らしい | かわいい (cute) | かわいらしい (charming/pretty) | Direct cuteness vs refined charm |
| 疲れる vs 疲れた | つかれる (get tired) | つかれた (got tired/am tired) | Process vs result state |
False Friend 1: 「気分が悪い」vs「病気」
Yuka「気分が悪い」は気持ち悪い・ちょっと具合が悪い感じ。「病気」はもっと深刻。
(気分が悪い = feeling unwell/nauseous. 病気 = being ill (more serious).)
Rei「気分が悪い」は感情的な不快感にも使えるね。
(気分が悪い can also mean emotionally uncomfortable.)
| Situation | Correct Word | Wrong Word |
|---|---|---|
| You feel a bit sick at a party | 気分が悪いです | 病気です |
| You’ve been diagnosed with a cold | 病気です | 気分が悪い |
| Something made you feel disgusted | 気分が悪い | 病気 |
False Friend 2: 怖い vs 可哀想
Yuka「怖い」は自分が怖いと感じること。「可哀想」は他の人を可哀想に思うこと！
(怖い = you feel scared. 可哀想 = you feel sorry for someone else!)
| Japanese | Meaning | Example |
|---|---|---|
| 怖い (こわい) | Scary / frightened | あの映画は怖かった (that movie was scary) |
| 可哀想 (かわいそう) | Pitiful / I feel sorry for them | 捨て猫が可哀想だ (I feel sorry for the stray cat) |
False Friend 3: 大丈夫 (Daijoubu) Overuse
Yuka「大丈夫」は英語で”I’m fine”, “It’s OK”, “No thanks”全部に使える万能語。でも使いすぎ注意！
(大丈夫 covers “I’m fine”, “It’s OK”, “No thanks” — but don’t overuse it!)
| Context | 大丈夫 Use | Example |
|---|---|---|
| “Are you OK?” | 大丈夫です。 | はい、大丈夫です。 |
| “Do you need help?” → declining | 大丈夫です。(No need, thanks.) | ありがとう、大丈夫です。 |
| Reassuring someone | 大丈夫だよ。(It’ll be fine.) | 心配しないで、大丈夫だよ。 |
| Declining food/drink offer | 大丈夫です。 | コーヒーは大丈夫です。 |
False Friend 4: Katakana Words That Differ From English
| Katakana | Sounds Like | Actual Meaning |
|---|---|---|
| マンション | mansion | Apartment building (not a mansion) |
| スマート | smart | Slim / stylish (not intelligent) |
| ナイーブ | naive | Sensitive / easily hurt (not gullible) |
| ユニーク | unique | Unusual / quirky (not one-of-a-kind) |
| サービス | service | Free extra / on the house (often) |
Quick Quiz
1. You feel sorry for someone who lost their job: _____
→ 可哀想だね
2. An apartment building in Japan is called: _____
→ マンション
3. You’re declining an offer politely: _____
→ 大丈夫です
Made this mistake before? Tell us in the comments — it helps other learners know they’re not alone! 💬
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