一切～ない

Japanese Grammar Advanced Japanese ★★★★ 4/5 formal いっさいissai
読み いっさい
ローマ字 issai
形 一切 + Predicate ない
漢字の分解 一 (いち) — one; 切 (さい) — cut, all

意味

A structure meaning 'not at all' or 'absolutely none,' used for emphatic total negation. It conveys that something is completely absent or that an action has never been performed.

一切～ない is one of the strongest negation patterns in Japanese, expressing complete and total absence or denial. Unlike 全然～ない, which is conversational and sometimes used loosely, 一切 carries a more formal and absolute tone. It is frequently used in official statements, contracts, and serious declarations where the speaker wants to leave no room for exceptions. The adverb 一切 can modify verbs, adjectives, and noun predicates, always requiring a negative ending. It is commonly seen in phrases such as 一切関係ない (absolutely no connection) and 一切責任を負わない (accept absolutely no responsibility). In conversation, it may sound stern or confrontational.

例文

  1. 当社はこの件に関して一切関与していない。
  2. 個人的な感情は一切挟まず、客観的に判断した。
  3. 彼女はその事実について一切言及しなかった。

使い方ガイド

場面: written, spoken, legal, business

トーン: absolute

正しい言い方

  • 未成年者への販売は一切行っておりません。
  • 過去の発言について一切撤回するつもりはない。
  • 外部からの干渉は一切受け付けない方針だ。

避ける言い方

  • 一切勉強した。(Using 一切 with a positive predicate — it requires negation) → 一切勉強しなかった。
  • 一切ちょっと問題がない。(Mixing 一切 with the softener ちょっと — contradictory emphasis) → 一切問題がない。

起源と歴史

一切 (いっさい) is a Buddhist term borrowed from Chinese, originally meaning 'everything' or 'all things' (一切衆生 — all sentient beings). In Japanese, it evolved to be used primarily with negation to mean 'none at all,' retaining its sense of totality but in a negative frame.

文化的背景

世代: All ages

社会的背景: Universal

関連フレーズ

何～ない A structure using 何 (なん/なに) with a negative predicate to express that something does not exist at all or that there is nothing of a particular kind. It creates emphatic absence. 滅多に～ない A structure indicating extremely low frequency, meaning 'rarely' or 'seldom.' It emphasises that something almost never happens or is encountered. ないことには A phrase meaning 'unless' or 'if one doesn't do something, then the next thing won't happen.' It emphasises that a certain action or state is a prerequisite for a desired outcome. ないでもない A double-negative phrase meaning 'it's not that I don't' or 'I somewhat do,' used to hesitantly or indirectly express a feeling, opinion, or possibility. It conveys reserved agreement or partial acknowledgement. ないまでも An adverbial phrase meaning 'even if not to the extent of' or 'if not X, then at least Y.' It expresses that while an ideal action or state may not be achieved, a lesser alternative should at minimum be pursued. なしに An adverbial phrase meaning 'without (doing) something,' indicating that an action proceeds in the absence of a condition or action. It can follow both nouns and verb dictionary forms. より・のほか（に）（は）～ない A phrase conveying that there is no other choice or option than to do something. It means 'there is nothing to do but' or 'the only option is,' expressing resigned determination. 一[Counter]として～ない A structure meaning 'not a single one' or 'not even one,' using a counter word to emphasise the complete absence of something. It is an emphatic way of saying zero.
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