は言うまでもない【はいうまでもない】

The expression は言うまでもない (はいうまでもない) is used to state that something is so obvious it doesn't even need to be said. It translates to "it goes without saying," "needless to say," or "obviously." The literal meaning is "there is no need to even say (as far as)."

Basic usage: stating the obvious

Attach は言うまでもない to a noun or nominalized clause to express that it is self-evident.

Connective form: は言うまでもなく

When you want to state the obvious thing and then add something beyond it, use the connective form はいうまでもなく言うまでもなく. This pattern means "not to mention X, (even) Y…"

Sentence-initial 言うまでもなく

いうまでもなく言うまでもなく can also be used at the beginning of a sentence as an adverb meaning "needless to say."

Related expression: 言うまでもないが

Adding が or けど after 言うまでもない creates a "goes without saying, but…" nuance, often used to remind someone of something they should already know.