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SILVER ERA · ことばを、少しずつ。
JLPT BANDN5 BEGINNER → N1 ADVANCED

〜もの / 〜もん

N3
mono / mon

because (casual excuse or self-justification)

Formation

Sentence + もの / もん

Chinese meanings

因为嘛;就是因为

Chinese formation

句子普通形+もの/もん

Chinese usage

在句末解释理由或为自己辩解,带有随意、撒娇的语气。

Chinese notes

常与だって搭配;もん更口语,正式场合应避免。

Examples

  • 「どうして食たべないの?」「だって、ピーマン嫌きらいなんだもん。」
    'Why aren't you eating?' 'Because I hate green peppers!'
    “为什么不吃?”“因为我讨厌青椒嘛。”
  • 一ひと人りで行いけるよ。もう子こどもじゃないもん。
    I can go by myself. I'm not a kid anymore!
    我可以一个人去,已经不是小孩子了嘛。
  • ケーキ、全ぜん部ぶ食たべちゃった。だって、すごくおいしかったんだもん。
    I ate the whole cake. Well, it was just so good!
    我把蛋糕全吃了。因为实在太好吃了嘛。

Notes

Sounds pouty or self-justifying; often begins with だって. もん is more colloquial. Used by children and among close friends; avoid at work.

#reason#casual

Related N3 grammar

Suggest an improvement

Use this entry in code
import { getGrammarById } from 'kotowa';
getGrammarById('mono-mon');
{
  "id": "mono-mon",
  "pattern": "〜もの / 〜もん",
  "romaji": "mono / mon",
  "level": "N3",
  "meaning": "because (casual excuse or self-justification)",
  "formation": "Sentence + もの / もん",
  "examples": [
    {
      "ja": "「どうして食べないの?」「だって、ピーマン嫌いなんだもん。」",
      "furigana": "「どうして{食|た}べないの?」「だって、ピーマン{嫌|きら}いなんだもん。」",
      "en": "'Why aren't you eating?' 'Because I hate green peppers!'"
    },
    {
      "ja": "一人で行けるよ。もう子どもじゃないもん。",
      "furigana": "{一人|ひとり}で{行|い}けるよ。もう{子|こ}どもじゃないもん。",
      "en": "I can go by myself. I'm not a kid anymore!"
    },
    {
      "ja": "ケーキ、全部食べちゃった。だって、すごくおいしかったんだもん。",
      "furigana": "ケーキ、{全部|ぜんぶ}{食|た}べちゃった。だって、すごくおいしかったんだもん。",
      "en": "I ate the whole cake. Well, it was just so good!"
    }
  ],
  "tags": [
    "reason",
    "casual"
  ],
  "notes": "Sounds pouty or self-justifying; often begins with だって. もん is more colloquial. Used by children and among close friends; avoid at work.",
  "zh": {
    "status": "reviewed",
    "source_hash": "f4c9bfcab0f3cc07d8a27aeed4c38f1553b47a9b433f925c59c008e311ab08f3",
    "meanings": [
      "因为嘛",
      "就是因为"
    ],
    "formation": "句子普通形+もの/もん",
    "explanation": "在句末解释理由或为自己辩解,带有随意、撒娇的语气。",
    "notes": "常与だって搭配;もん更口语,正式场合应避免。",
    "examples": [
      {
        "ja": "「どうして食べないの?」「だって、ピーマン嫌いなんだもん。」",
        "zh": "“为什么不吃?”“因为我讨厌青椒嘛。”"
      },
      {
        "ja": "一人で行けるよ。もう子どもじゃないもん。",
        "zh": "我可以一个人去,已经不是小孩子了嘛。"
      },
      {
        "ja": "ケーキ、全部食べちゃった。だって、すごくおいしかったんだもん。",
        "zh": "我把蛋糕全吃了。因为实在太好吃了嘛。"
      }
    ],
    "references": [
      "sources/grammar/n3.json#mono-mon",
      "Original Chinese authored and reviewed by Codex; no independent human review"
    ],
    "reviewer": "Codex",
    "review_method": "ai",
    "reviewed_at": "2026-10-28",
    "review_hash": "89d7866c3867dee69dd28721764aab11d4401b82ea3a93e25a3190ce3f57760f"
  }
}