How to say "contention" in Japanese

• 競合きょうごうCommon
  noun, suru verb, intransitive verbContention as rivalry: parties or things competing for the same prize, customers, or position, so that their interests collide. Fits when the emphasis is on vying rather than quarreling.
  すべての競合きょうごう会社かいしゃがパイの分け前わけまえを得えようとしています。↗

  All the competitors are trying to get their piece of the pie.
• 係争けいそうCommon
  noun, suru verb, intransitive verbContention in the sense of a formal dispute between parties, typically over rights or interests and often handled through legal channels; closer to 'dispute' or 'controversy' than to a quarrel.
• 主張しゅちょうJLPT N3approx.Common
  noun, suru verb, transitive verbContention as an asserted claim or position — what someone maintains in argument or discussion, as in 'my contention is that…'. Here the English word means a claim, not a conflict.
  私わたしたちはその重要性じゅうようせいを主張しゅちょうした。↗

  We insisted on its importance.
• 抗争こうそうJLPT N1approx.Common
  noun, suru verb, intransitive verbContention as open strife: a feud or prolonged struggle between opposing groups or factions, with confrontation rather than mere competition. Suits rival camps locked in conflict.
  新聞しんぶんは２党とう間かんの抗争こうそうを報ほうじた。↗

  The newspaper reported friction between the two parties.

Choose 競合 for contention as rivalry over the same prize, 係争 for a formal dispute, 主張 for a contention one asserts in argument, and 抗争 for open strife or feud between opposing sides.

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

• 競合きょうごうcontention
• 係争けいそうdispute
• 主張しゅちょうclaim
• 抗争こうそうrivalry
• コンテンションcontention (e.g. in LANs)
• 回線争奪かいせんそうだつcontention
• 争いごとあらそいごとdispute
• 競いきそいcompetition