How to say "extraordinarily" in Japanese

• めっぽう
  adverbCovers 'extraordinarily, astonishingly, terribly': an adverb stressing that a degree is astonishingly high, as when praising someone's strength or skill. Less common, and usually written in kana.
  彼かれは滅法めっぽう強つよいね。↗

  He's going from strength to strength.
• 超がつくちょうがつく
  expressionColloquial, literally 'with 超 (super-) attached': it says something is so extreme it deserves a 'super-' label, as in casual talk of exceptional difficulty or popularity.
• 斜めならずななめならず
  expressionCovers 'unusually, uncommonly'. It is really a set phrase for saying a quality is uncommonly great, not a general intensifier, and being less common it is seldom the word you want.
• 超のつくちょうのつく
  expressionColloquial, literally 'carrying a 超 (super-)': it modifies a noun to present it as a superlative case — a 'super-' example of its kind, as in casual praise of exceptional talent.
• とびきりCommon
  noun, adverbA common adverb for 'exceptionally, by far': it praises something as standing out from all others, as with exceptionally fine food, weather, or quality. Usually written in kana; the safest first choice.
  マイクは君きみの妹いもうとのこと、とびきりいかしてるって思おもってるんだ。↗

  Mike really thought your sister was something else.

Pick 「とびきり」 as your default for 'exceptionally'; 「めっぽう」 adds an astonished edge; colloquial 「超がつく」 and 「超のつく」 brand something a 'super-' case, the latter before a noun; 「斜めならず」 is a rarer 'uncommonly'.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• めっぽうextraordinarily
• 超がつくちょうがつくextremely
• 斜めならずななめならずunusually
• 超のつくちょうのつくextremely
• とびきりexceptionally
• とびっきりexceptionally