How to say "excess" in Japanese

• 過剰かじょうJLPT N2approx.Common
  noun, na-adjectiveThe noun to reach for when 'excess' means an overabundance — an amount beyond what is needed or appropriate. It covers the general, often abstract sense of too much of something.
  安やすい輸入品ゆにゅうひんで市場しじょうが供給きょうきゅう過剰かじょうになるだろう。↗

  Cheap imports will glut the market.
• 超過ちょうかJLPT N2approx.Common
  noun, suru verb, intransitive verbCovers 'excess' specifically as exceeding — going over a limit or estimate. Think 'going over' rather than mere surplus: the amount is measured against some set figure.
  その車くるまは制限せいげん速度そくどを超過ちょうかしている。↗

  The car is exceeding the speed limit.
• 余分よぶんJLPT N3approx.Common
  na-adjective, nounBest when 'excess' really means 'extra': a surplus, or simply more than is needed. It is lighter than 過剰 and does not suggest anything extreme.
  私わたしたちは余分よぶんに１０ドル必要ひつようだ。↗

  We'll need an extra ten dollars.
• 過多かたJLPT N1approx.Common
  noun, na-adjectiveAlso means 'excess; superabundance': the state of a particular thing being present in too large an amount. It is close to 過剰, and either can express 'an excess of' something.
• むちゃくちゃJLPT N1approx.Common
  na-adjectiveNot a noun for 'excess': it matches only the adverbial 'to excess' — doing something extremely or senselessly. Its core senses are 'extremely' and 'senseless', so it is seldom what you want here.

Use 過剰 for excess as an overabundance, 超過 for going over a limit or estimate, 余分 for extra amounts, 過多 for the state of too much of something, and 「むちゃくちゃ」 only for adverbial 'to excess'.

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

• 過剰かじょうexcess
• 超過ちょうかexcess
• 余分よぶんextra
• 過多かたexcess
• 限外げんがいexcess
• これでもかというほどas if it weren't already enough
• 超過分ちょうかぶんsurplus
• むちゃむちゃawfully
• むちゃくちゃawfully
• エクストラextra