言うまでもない

• Reading: いうまでもない
• Romaji: iu made mo nai
• Formation: Clause + のは / ことは + 言うまでもない / 言うまでもなく + Clause
• Kanji breakdown: 言 (い) — to say, to speak

Meaning

A phrase meaning 'it goes without saying' or 'needless to say,' used to indicate that something is so obvious or well-known that it does not require explicit mention. Despite this, the speaker typically proceeds to state it for emphasis.

いうまでもない functions as a rhetorical device: the speaker declares that something is self-evident, then often states it anyway for emphasis or completeness. It appears frequently in formal writing, speeches, and arguments to reinforce a point the audience already recognises. The phrase can modify a noun directly (言うまでもないことだが) or stand as a predicate (健康が大切なのは言うまでもない). The related form 言うまでもなく functions adverbially and leads directly into the main clause. It is more formal than もちろん or 当然 and carries a tone of authoritative assertion.

Examples

1. 健康管理が仕事の基盤であることは言うまでもない。 It goes without saying that health management is the foundation of work.
2. 言うまでもなく、信頼関係は一朝一夕に築けるものではない。 Needless to say, trust cannot be built overnight.
3. 環境保護の重要性は言うまでもないが、経済との両立も不可欠だ。 The importance of environmental protection goes without saying, but balancing it with the economy is also essential.

Usage Guide

Context: written, formal speech, essays

Tone: assertive

Do Say

• 教育が国の将来を左右することは言うまでもない。
• 言うまでもなく、安全対策は最優先事項である。
• 顧客満足度が企業の成長に直結するのは言うまでもない。

Don't Say

• 私の名前は田中だということは言うまでもない。(Stating personal information that is not universally obvious) → ご存知の通り、田中と申します。
• 言うまでもないけど、今日の夕食は何にする？(Using a formal rhetorical phrase in a trivial everyday question) → ところで、今日の夕食は何にする？

Origin & History

Composed of 言う (to say), まで (up to the point of), も (even), and ない (not). Literally 'it doesn't even reach the point of saying,' this phrase has been used since the Edo period as a rhetorical formula to assert the obviousness of a claim.

Cultural Context

Generation: All ages

Social background: Universal