noun
main point; essence; important thing
Refers to the central or most important part of a matter. Often used in phrases like 要は or 要するに to mean 'in short' or 'the point is'.
要は、努力を続けることだ。
The main point is to keep making an effort.
話の要をまとめてください。
Please summarize the key points of the talk.
noun, noun-modifying (irregular)
Used to express that something is necessary or required. Often appears in the pattern 要がある (there is a need to...) or as a prenominal modifier in formal contexts.
すぐに対応する要がある。
There is a need to respond immediately.
これは要の書類です。
This is an essential document.