〜や否や（やいなや）

This means a second thing happens right after a first thing. It shows almost no time passed between them. It can feel sudden or surprising.

This means something happens right after another thing. It is like saying "as soon as" or "the moment that."

Contrasts with(2)

〜次第

This means "as soon as" or "once." You use it when one thing will happen right after another. It is for formal talks or business plans.

This means that right after you do something, something else happens. It often feels like the second thing makes the first thing useless.

More formal alternatives(6)

This phrase means "the moment" or "as soon as." It shows that something else happened right after the first thing. Sometimes, it shows surprise.

This means a second thing happens right after a first thing. It shows almost no time passed between them. It can feel sudden or surprising.

〜なり

This grammar shows that one thing happens right after another. The second thing is often a surprise. The same person usually does both actions.

This means something happens right after another thing. It is like saying "as soon as" or "the moment that."

This means that right after you do something, something else happens. It often feels like the second thing makes the first thing useless.

This means something happened right after another thing. It often shows surprise. Think of it like 'as soon as' or 'the moment that'.

辞書形

This is the basic form of a verb. It is what you find in a dictionary. You use it to make other verb forms.

This means something happened right after another thing. It often shows surprise. Think of it like 'as soon as' or 'the moment that'.

This means a second thing happens right after a first thing. It shows almost no time passed between them. It can feel sudden or surprising.

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Dictionary

〜や否や（やいなや）

This means that something happened right after something else. It shows things happened very, very fast.

N1 KMT8FormalStandardCompound ParticleWritten OnlyImmediately Upon ActionGrammar

Verb [dictionary form] + や否やPrimary

This means that something happened right after something else. It shows things happened very, very fast.

その知らせが届くや否や、彼は部屋を飛び出した。

As soon as that news arrived, he dashed out of the room.

FormalPastAffirmativeMid SentenceDeclarativeDaily Life Emotions & Psychology

新サービスが開始されるや否や、アクセスが集中してサーバーがダウンした。

The moment the new service launched, traffic surged and the server went down.

FormalPastAffirmativeMid SentenceDeclarativeTechnology Internet & Social Media Business & Finance

彼は私の顔を見るや否や、何も言わずに背を向けた。

As soon as he saw my face, he turned his back without saying anything.

NeutralPastNegativeMid SentenceDeclarativeFamily & Relationships Emotions & Psychology

コンサートの幕が上がるや否や、観客は総立ちになった。

As soon as the concert curtain rose, the audience gave a standing ovation.

FormalPastAffirmativeMid SentenceDeclarativeMusic & Entertainment

空が暗くなるや否や、大粒の雨が降り始めた。

The moment the sky turned dark, large raindrops began to fall.

NeutralPastAffirmativeMid SentenceDeclarativeWeather & Geography Nature & Environment

Don't use this when you want to do something. For example, you cannot say "As soon as the train came, let's ride it."

Often confused with(2)

This means a second thing happens right after a first thing. It shows almost no time passed between them. It can feel sudden or surprising.

This means something happens right after another thing. It is like saying "as soon as" or "the moment that."

Contrasts with(2)

〜次第

This means "as soon as" or "once." You use it when one thing will happen right after another. It is for formal talks or business plans.

This means that right after you do something, something else happens. It often feels like the second thing makes the first thing useless.

More formal alternatives(6)

This phrase means "the moment" or "as soon as." It shows that something else happened right after the first thing. Sometimes, it shows surprise.

This means a second thing happens right after a first thing. It shows almost no time passed between them. It can feel sudden or surprising.

〜なり

This grammar shows that one thing happens right after another. The second thing is often a surprise. The same person usually does both actions.

This means something happens right after another thing. It is like saying "as soon as" or "the moment that."

This means that right after you do something, something else happens. It often feels like the second thing makes the first thing useless.

This means something happened right after another thing. It often shows surprise. Think of it like 'as soon as' or 'the moment that'.

辞書形

This is the basic form of a verb. It is what you find in a dictionary. You use it to make other verb forms.

This means something happened right after another thing. It often shows surprise. Think of it like 'as soon as' or 'the moment that'.