How to say "firm" in Japanese

• 会社かいしゃJLPT N5approx.Common
  nounCovers 'firm' as a noun meaning a business company or corporation. When English 'firm' simply names a company or enterprise, this is the word to use.
  彼かれの努力どりょくは会社かいしゃの成長せいちょうに貢献こうけんした。↗

  His effort contributed to my company's growth.
• 商店しょうてんJLPT N2approx.Common
  nounPrimarily means a shop or store; it matches 'firm' only where the firm is a shop-type establishment, not a company. For 'firm' in the company sense, 会社 is the word you want.
  この地域ちいきは商店しょうてんが多おおい。↗

  There are many stores in this area.
• 強固きょうこCommon
  na-adjectiveCovers 'firm' as an adjective: solid, strong, and stable, describing things that will not waver — a firm foundation, a firm belief, a firm grip.
  この実験じっけんで彼かれの学説がくせつはいっそう強固きょうこなものになった。↗

  The experiment confirmed his theory.
• 堅調けんちょうCommon
  na-adjective, nounRestricted to financial markets: describes share prices or trading as firm or bullish, that is, steady or tending to rise. Use it only in market commentary, not for physical firmness.
• 断固だんこCommon
  taru-adjective, adverb (with と)Describes a firm, resolute attitude or decision — standing firm about refusing or pressing something. It characterizes a person's stance rather than a physical or market quality.
  私は家いえにとどまるようにと彼かれらに懸命けんめいに言いったが、彼かれらは断固だんことして私の意見いけんに耳みみを傾かたむけようとはしなかった。↗

  I tried hard to make them stay home, but they refused to listen to me.

For 'firm' as a business use 会社 (or 商店 for a shop-type establishment); for firmness that is solid or stable use 強固; for markets use 堅調; for a resolute attitude or decision use 断固.

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

• 会社かいしゃcompany
• 商店しょうてんshop
• 強固きょうこfirm
• 堅調けんちょうfirm (market)
• 断固だんこfirm
• 強硬きょうこうfirm
• 確固かっこfirm
• 頑丈がんじょうsolid
• 不動ふどうimmovable
• 商会しょうかいfirm
• 堅固けんごsolid
• 気丈きじょうstout-hearted
• 公司コンスcompany (in China)
• 強気つよきconfident
• 厳重げんじゅうstrict
• 泰然たいぜんcalm
• 決然けつぜんdecisive
• 社しゃcompany
• ファームfirm
• 手強いてづよいstrong
• 揺るぎないゆるぎないfirm
• 不抜ふばつfirm
• 腰が強いこしがつよいfirm
• 断々固だんだんこfirm
• 牢固ろうこfirm
• 腰の強いこしのつよいfirm
• 毅然きぜんresolute
• 商館しょうかんtrading company (esp. a Japanese outpost of a foreign firm)
• 引き締まったひきしまったlean
• 安定したあんていしたsteady
• 硬いかたいstrong
• 確かたしかreliable
• 手堅いてがたいsteady
• いかめしいstrict (e.g. security)
• こりこりfirm (musculature)
• かっちりclose-fitting (e.g. suit)
• 気丈夫きじょうぶstout-hearted
• 硬調こうちょうbullish (market)
• 強いつよいfirm