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

〜わけだ

N3
wake da

no wonder; that's why; it follows that

Formation

Verb-plain / i-Adj / na-Adj + な / Noun + という + わけだ

Chinese meanings

难怪;原来如此;也就是说

Chinese formation

动词普通形/い形容词普通形/な形容词词干+な/名词+という+わけだ

Chinese usage

根据已知事实得出自然的结论,也可表示弄明白了原因。

Chinese notes

常与だから、どうりで等呼应。

Examples

  • 三さん年ねんも中ちゅう国ごくに住すんでいたんですか。だから中ちゅう国ごく語ごが上じょう手ずなわけですね。
    You lived in China for three years? That's why your Chinese is so good.
    你在中国住过三年啊,难怪中文这么好。
  • 窓まどが全ぜん部ぶ開あいている。どうりで寒さむいわけだ。
    All the windows are open. No wonder it's cold.
    窗户全开着,难怪这么冷。
  • この本ほんは三さん百びゃくページだから、一いち日にちに二に十じゅうページ読よめば、十じゅう五ご日にちで読よみ終おわるわけだ。
    This book has 300 pages, so if I read twenty pages a day, that means I'll finish it in fifteen days.
    这本书有三百页,每天读二十页的话,也就是说十五天能读完。

Notes

States a conclusion that follows naturally from known facts, often with a feeling of 'now I understand'. Often preceded by だから, それで or どうりで.

#reason#result

Related N3 grammar

Suggest an improvement

Use this entry in code
import { getGrammarById } from 'kotowa';
getGrammarById('wake-da');
{
  "id": "wake-da",
  "pattern": "〜わけだ",
  "romaji": "wake da",
  "level": "N3",
  "meaning": "no wonder; that's why; it follows that",
  "formation": "Verb-plain / i-Adj / na-Adj + な / Noun + という + わけだ",
  "examples": [
    {
      "ja": "三年も中国に住んでいたんですか。だから中国語が上手なわけですね。",
      "furigana": "{三|さん}{年|ねん}も{中国|ちゅうごく}に{住|す}んでいたんですか。だから{中国|ちゅうごく}{語|ご}が{上手|じょうず}なわけですね。",
      "en": "You lived in China for three years? That's why your Chinese is so good."
    },
    {
      "ja": "窓が全部開いている。どうりで寒いわけだ。",
      "furigana": "{窓|まど}が{全部|ぜんぶ}{開|あ}いている。どうりで{寒|さむ}いわけだ。",
      "en": "All the windows are open. No wonder it's cold."
    },
    {
      "ja": "この本は三百ページだから、一日に二十ページ読めば、十五日で読み終わるわけだ。",
      "furigana": "この{本|ほん}は{三百|さんびゃく}ページだから、{一|いち}{日|にち}に{二|に}{十|じゅう}ページ{読|よ}めば、{十|じゅう}{五|ご}{日|にち}で{読|よ}み{終|お}わるわけだ。",
      "en": "This book has 300 pages, so if I read twenty pages a day, that means I'll finish it in fifteen days."
    }
  ],
  "tags": [
    "reason",
    "result"
  ],
  "notes": "States a conclusion that follows naturally from known facts, often with a feeling of 'now I understand'. Often preceded by だから, それで or どうりで.",
  "zh": {
    "status": "reviewed",
    "source_hash": "2b13b098f101dc091cf70c887b46c71f82d42a98eedab23797fa559e3f5a702d",
    "meanings": [
      "难怪",
      "原来如此",
      "也就是说"
    ],
    "formation": "动词普通形/い形容词普通形/な形容词词干+な/名词+という+わけだ",
    "explanation": "根据已知事实得出自然的结论,也可表示弄明白了原因。",
    "notes": "常与だから、どうりで等呼应。",
    "examples": [
      {
        "ja": "三年も中国に住んでいたんですか。だから中国語が上手なわけですね。",
        "zh": "你在中国住过三年啊,难怪中文这么好。"
      },
      {
        "ja": "窓が全部開いている。どうりで寒いわけだ。",
        "zh": "窗户全开着,难怪这么冷。"
      },
      {
        "ja": "この本は三百ページだから、一日に二十ページ読めば、十五日で読み終わるわけだ。",
        "zh": "这本书有三百页,每天读二十页的话,也就是说十五天能读完。"
      }
    ],
    "references": [
      "sources/grammar/n3.json#wake-da",
      "Original Chinese authored and reviewed by Codex; no independent human review"
    ],
    "reviewer": "Codex",
    "review_method": "ai",
    "reviewed_at": "2026-10-28",
    "review_hash": "8db2e8e42402c3b86983dbf66ffab1ca438600fb373055f5939a4466e01151fb"
  }
}