connective N3 common writtenpolite
〜は言うまでもない — it goes without saying that ~
〜は言うまでもない ・ はいうまでもない
Meaning
- it goes without saying that ~ — 言うまでもない with the obvious point marked by は
Key sentence
努力が必要なのは言うまでもない。
It goes without saying that effort is necessary.
Easily confused with
See 〜は言うまでもない in real sentences
Jengo shows 〜は言うまでもない the way you actually meet it: inside real Japanese sentences, so it sticks instead of staying an abstract rule.
Study it in JengoSources Compiled from published Japanese grammar references.