How to say "considerably" in Japanese

• かなりJLPT N3approx.Common
  adverb, no-adjective, na-adjectiveA direct, all-purpose match for 'considerably' as 'to a noticeable degree'; since it also glosses as 'fairly, quite, rather', it covers degrees from moderate up to considerable.
  ４マイルはかなりの距離きょりだ。↗

  Four miles is a good distance.
• だいぶJLPT N4approx.Common
  adverbCovers 'considerably' in the sense of 'greatly, a lot': use it when emphasizing that an amount, extent, or degree of change is large rather than merely noticeable.
  だいぶ痛いたみがなくなりました。↗

  The pain has mostly gone away.
• なかなかJLPT N4approx.Common
  adverb, na-adjectiveSeldom the word you want for plain 'considerably': its core senses are 'very, quite' and 'easily, readily', so choose it only when that 'quite' or 'readily' meaning is what you intend.
  あいつは、なかなかいい奴やつだぜ！↗

  He is a good joker.
• 少なからずすくなからずCommon
  adverbExpresses 'considerably' through understatement — literally 'not a little' — so it fits when you want to present a degree or number as 'no small' one, matching its gloss 'in no small numbers'.
  私は少すくなからずがっかりした。↗

  I was not a little disappointed.
• ずいぶんJLPT N4approx.Common
  adverb (with と)Suits 'considerably' when the extent strikes you as remarkable: its glosses run from 'fairly' up to 'very, extremely', and 'surprisingly' hints at a degree that exceeds what you expected.
  私わたしたちはもうずいぶん長ながくここにいます。↗

  We've been here long enough.

Choose 「かなり」 as the all-purpose 'considerably; fairly', 「だいぶ」 when emphasizing a large amount or change, 「ずいぶん」 when the degree feels strikingly large, 「少なからず」 for understated 'not a little', and 「なかなか」 rarely, since it chiefly means 'very' or 'easily'.

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

• かなりconsiderably
• だいぶconsiderably
• なかなかvery
• 少なからずすくなからずconsiderably
• ずいぶんvery
• 大いにおおいにvery
• めっきりremarkably
• よっぽどvery
• 著しくいちじるしくconsiderably
• なかなかどうしてconsiderably (beyond one's expectations)
• 多分にたぶんにin great amount
• ぐっとconsiderably
• 相当そうとうconsiderably
• 大概たいがいconsiderably
• いい加減いいかげんconsiderably
• ええ加減ええかげんconsiderably