How to say "partnership" in Japanese

• 協同組合きょうどうくみあいCommon
  nounIt names a formal entity — a cooperative or similar association — so it fits 'partnership' only in that organizational sense, not for the relationship or act of partnering with someone.
• タイアップCommon
  noun, suru verb, intransitive verbPartnership as a business tie-up or collaboration, especially a promotional tie-in — a joint campaign or project between companies; the word is a katakana loanword from 'tie-up'.
• 共同きょうどうJLPT N3approx.Common
  noun (prefix), suru verb, intransitive verb, no-adjectiveExpresses doing something jointly or together, so it matches 'partnership' only loosely; it is really the idea of 'joint' or 'cooperation', seldom the standalone word for a partnership itself.
  私わたしたちはその店みせを共同きょうどうで経営けいえいしている。↗

  We run the store jointly.
• 提携ていけいJLPT N1approx.Common
  noun, suru verb, transitive verb, intransitive verbThe word you want for a business partnership: companies or organizations agreeing to cooperate and form a tie-up or joint business arrangement.
  うちの会社かいしゃはあの合弁ごうべん会社かいしゃと提携ていけいしている。↗

  We are affiliated with the new joint venture company.

Choose 提携 for a business alliance between companies, 「タイアップ」 for a promotional or media tie-up, 協同組合 for partnership as a formal cooperative organization, and 共同 for the general idea of joint action.

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

• 協同組合きょうどうくみあいcooperative
• タイアップtie-in
• 共同きょうどうcooperation
• 提携ていけいcooperation
• パートナーシップpartnership
• 協調関係きょうちょうかんけいcooperative relationship
• コーポラティブcooperative
• 協力関係きょうりょくかんけいcooperative relation