〜や否や

As Soon as

Level 4Sounds Like yahiya

〜や否や（やいなや） is a formal, literary pattern used to describe an event that happens immediately after another. It emphasizes that there is virtually no time gap between the two actions.

How It Works

〜や否や is an advanced N1 expression used to link two events in a rapid sequence.

Key Characteristics:

  • Immediate Sequence: It suggests that the second action occurs almost simultaneously with the first.
  • Intentional Actions: Unlike 〜た途端, the second clause in 〜や否や can include intentional actions by the speaker. While it can express surprise, it is often used to describe a sequence of events vividly.
  • 'Waiting For' Nuance: This pattern often carries a nuance that the second action was 'waiting' to happen or was poised to start the moment the first action finished (e.g., rushing out the door the moment a meeting ends).
  • Register: This is 書き言葉（かきことば） (written language). You will rarely hear this in casual conversation; instead, you would use 〜たらすぐ or 〜た途端.
  • Literary Variant: The shortened form 〜や is a synonymous literary variant often used in the same context.
  • Grammatical Restriction: The second clause (Action B) must be a past fact or a habitual occurrence. You cannot use this pattern for future intentions, requests, or commands. For future 'as soon as,' use 〜次第.

Formation:
Verb (Dictionary Form) + 〜や否や
Example: 食べる（たべる） + 〜や否や → 食べるや否や

Examples (4)

  1. 彼は家に帰るや否や、倒れ込むように眠ってしまった。

    The moment he got home, he collapsed into a deep sleep.

    Word by Word: He as for home return or not, falling-in-like slept.

    This shows the immediate transition from arriving home to falling asleep. The dictionary form 帰る（かえる） is used even though the event happened in the past.

  2. 空が暗くなるや否や、大粒の雨が降り出した。

    No sooner had the sky turned dark than heavy rain began to fall.

    Word by Word: Sky as for dark become or not, large-drop rain fall-started.

    This describes a natural phenomenon where one event triggers another instantly. The use of 〜や否や adds a dramatic, literary tone.

  3. その政治家は、記者の姿を見るや否や、逃げるように立ち去った。

    As soon as that politician saw the reporters, he left as if running away.

    Word by Word: That politician as for, reporters' appearance see or not, escape-like left.

    This highlights a swift reaction to a stimulus. The subject of the first clause (seeing) and the second clause (leaving) is the same here, but they can be different.

  4. ベルが鳴るや否や、生徒たちは教室を飛び出した。

    As soon as the bell rang, the students rushed out of the classroom.

    Word by Word: Bell ring or not, students as for classroom particle fly-out-past.

    This demonstrates that the subjects of the two clauses can be different (the bell and the students).

Common Mistakes

  • Using the past tense (Ta-form) before the pattern.

    × 食べたや否や、気分が悪くなった。
    ○ 食べるや否や、気分が悪くなった。

    Even if the entire sentence is in the past tense, the verb immediately preceding 〜や否や must always be in the dictionary form.

  • Using the pattern for future requests or intentions.

    × 駅に着くや否や、電話してください。
    ○ 駅に着き次第、電話してください。

    〜や否や is used to describe facts that have already occurred or are occurring. For future requests ('Please do X as soon as Y'), use 〜次第.

How It Connects

Tap a pattern to see what it builds on and what it leads to.

〜や否やLevel 4As Soon as

Learn This First

〜や否や is a formal grammar pattern used to describe an action that happens immediately after another. To understand it, you need to know how to use the dictionary form of verbs and be familiar with other 'immediate sequence' patterns like 〜た途端(に). Since it is primarily used in formal writing, understanding the difference between casual and formal Japanese is also important.

Words in This Pattern

や否や