JAPANESE STUDY SYSTEMKOTOWA 词和
N5 — N1
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SILVER ERA · ことばを、少しずつ。
JLPT BANDN5 BEGINNER → N1 ADVANCED

〜に相違ない

N2
〜にそういない ni soui nai

without doubt; must be; surely

Formation

Verb-plain / i-Adj / na-Adj / Noun + に相違ない

Chinese meanings

一定;无疑

Chinese formation

动词・い形容词普通形+に相違ない;な形容词词干・名词+に相違ない

Chinese usage

表示说话人坚信某事。

Chinese notes

较に違いない正式。

Examples

  • この筆ひっ跡せきは、父ちちのものに相そう違いない。
    This handwriting is without doubt my father's.
    这笔迹一定是父亲的。
  • 彼かれの証しょう言げんが事じ実じつなら、事じ件けんの背はい後ごには別べつの人じん物ぶつがいるに相そう違いない。
    If his testimony is true, there must be someone else behind the incident.
    如果他的证词属实,事件背后一定另有其人。

Notes

A written, formal equivalent of 〜に違いない (N3). Also seen on forms: 上記の通り相違ありません ('the above is correct').

#conjecture#formal#written

Related N2 grammar

Suggest an improvement

Use this entry in code
import { getGrammarById } from 'kotowa';
getGrammarById('ni-soui-nai');
{
  "id": "ni-soui-nai",
  "pattern": "〜に相違ない",
  "reading": "〜にそういない",
  "romaji": "ni soui nai",
  "level": "N2",
  "meaning": "without doubt; must be; surely",
  "formation": "Verb-plain / i-Adj / na-Adj / Noun + に相違ない",
  "examples": [
    {
      "ja": "この筆跡は、父のものに相違ない。",
      "furigana": "この{筆跡|ひっせき}は、{父|ちち}のものに{相違|そうい}ない。",
      "en": "This handwriting is without doubt my father's."
    },
    {
      "ja": "彼の証言が事実なら、事件の背後には別の人物がいるに相違ない。",
      "furigana": "{彼|かれ}の{証言|しょうげん}が{事実|じじつ}なら、{事件|じけん}の{背後|はいご}には{別|べつ}の{人物|じんぶつ}がいるに{相違|そうい}ない。",
      "en": "If his testimony is true, there must be someone else behind the incident."
    }
  ],
  "tags": [
    "conjecture",
    "formal",
    "written"
  ],
  "notes": "A written, formal equivalent of 〜に違いない (N3). Also seen on forms: 上記の通り相違ありません ('the above is correct').",
  "zh": {
    "status": "reviewed",
    "source_hash": "6777fd22e858557e8f54b17c7971620a9ce32bf78fc30acfb0bd38e9893881a7",
    "meanings": [
      "一定",
      "无疑"
    ],
    "formation": "动词・い形容词普通形+に相違ない;な形容词词干・名词+に相違ない",
    "explanation": "表示说话人坚信某事。",
    "notes": "较に違いない正式。",
    "examples": [
      {
        "ja": "この筆跡は、父のものに相違ない。",
        "zh": "这笔迹一定是父亲的。"
      },
      {
        "ja": "彼の証言が事実なら、事件の背後には別の人物がいるに相違ない。",
        "zh": "如果他的证词属实,事件背后一定另有其人。"
      }
    ],
    "references": [
      "sources/grammar/n2.json#ni-soui-nai",
      "Original Chinese authored and reviewed by Codex; no independent human review"
    ],
    "reviewer": "Codex",
    "review_method": "ai",
    "reviewed_at": "2026-10-28",
    "review_hash": "c54785fb28fc0fe547fac35723149f88b8905beeed5ecce78146566c5327ae2e"
  }
}