言うまでもない【いうまでもない】

言うまでもない (いうまでもない) is a set expression meaning "it goes without saying," "needless to say," or "obviously." It is used to emphasize that something is so evident or well-known that it doesn't even need to be stated.

The expression is composed of ゆう言う (to say) + まで (to the extent of) + も (even) + ない (not) – literally "it doesn't even go as far as saying," i.e., there is no need to say it.

Basic usage

It can be used as a standalone predicate at the end of a sentence:

言うまでもなく as an adverbial form

When used mid-sentence to modify the following clause, it takes the adverbial form いうまでもなく言うまでもなく:

言うまでもないことだが

A common pattern is 言うまでもないことだが, meaning "this goes without saying, but…," used when the speaker wants to state something obvious as a reminder or preface:

Formality

This expression is relatively formal and is commonly found in written Japanese, speeches, and formal conversations. In casual speech, simpler expressions like もちろん or あたりまえ当たり前 are more natural.