Grammar Info

N2 Lesson 1: 13/23


Without a doubt, Certainly, Surely, Not mistaken


Verb + (から)+ 相違(そうい)ない
[い]Adjective + (から)+ 相違(そうい)ない
[な]Adjective + (である(1))+ 相違(そうい)ない
Noun + (である(1))+ 相違(そうい)ない

(1) であるから


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About に相違ない

In a similar fashion to に(ちが)いない, 相違(そうい)ない is a structure that firmly states that something is 'without a doubt (A)', or that there is 'no mistaking (A)'. It may be used to strengthen one's own opinions, or to strongly agree with the opinion of another. Although 相違(そうい) may be used by itself meaning 'to differ', or 'to have a discrepancy', 相違(そうい)ない is considered as a set い-Adjective. When combined with ない, the literal meaning is just 'there is no discrepancy in (A)'.
相違(そうい)ない may be used with verbs, い-Adjectives, な-Adjectives and nouns.
  • (かれ)小学生(しょうがくせい)(ころ)から一生懸命(いっしょうけんめい)勉強(べんきょう)をし(つづ)けたので、いい大学(だいがく)()ける相違(そうい)ない
    Since he's been studying hard since he was in elementary school, there's no doubt that he can go to a good university.
  • このコースはあの世界的(せかいてき)有名(ゆうめい)なシェフによって()られたものなので美味(おい)しい相違(そうい)ない
    This course has been prepared by a world famous chef, so there is no doubt that it will be delicious.
  • この(まち)には電車(でんしゃ)が3(ぷん)に1(ぽん)()るので便利(べんり)相違(そうい)ない
    In this city, a train comes every 3 minutes, so there is no doubt that it is convenient.
  • あの事件(じけん)犯人(はんにん)はあの(ひと)相違(そうい)ない
    There is no doubt that that person is the culprit.
に相違ない will often follow から, highlighting that there is no mistaking the 'cause' of (A).
  • (かれ)がキョロキョロしているのは、(うそ)をついているから相違(そうい)ない
    There is no doubt that he's being restless because he's lying.
  • この(わざ)全国(ぜんこく)大会(たいかい)禁止(きんし)されているのは(あぶ)ないから相違(そうい)ない
    There's no doubt that the reason why this move is forbidden in all competitions across the nation is because it's dangerous.
Caution - This grammar structure is very formal, with に(ちが)いない almost always being used in its place.




    Doctor Tanaka is a first-class surgeon, so the surgery will be successful without a doubt.


    According to the report, this new virus is, without a doubt, spreading through the air.


    Reporter: 'The prime minister said that that he is certain that next year's tax reduction will reduce the gray zone.' (without a doubt)


    Public prosecutor: 'It is certain that the cause of the victim's death was a blow from something like an iron pipe.' (without a doubt)


    Section manager: 'Competitors are surely plotting something.' (without a doubt)

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