何から何まで【なにからなにまで】

何から何まで (literally "from what to what") is an idiomatic expression meaning "everything and anything", "from A to Z", or "absolutely everything without exception". It emphasizes completeness or thoroughness – that something covers every single aspect, leaving nothing out.

This expression is used when the speaker wants to stress that there are no exceptions or omissions, whether positively (gratitude, admiration) or negatively (complaint, exasperation).

Expressing gratitude or appreciation

A very common use is to thank someone who has helped with absolutely everything:

Expressing thoroughness

It can describe someone who knows, does, or handles everything:

Expressing frustration or complaint

It can also carry a negative nuance, implying that something is excessive or overbearing:

Usage notes

• 何から何まで functions adverbially and typically modifies the verb or predicate that follows it.
• It is more emphatic than simply saying ぜんぶ全部 or すべて. While those words neutrally state "all" or "everything," 何から何まで highlights that every last detail is included.
• This expression is used in both formal and informal contexts, though it appears frequently in polite speech when expressing gratitude.