How to say "intervene" in Japanese

• 止めに入るとめにはいる
  expression, godan verbCovers intervening in order to stop something. Picture someone stepping in to stop a fight: the emphasis is on halting the action, not on mediating between the sides.
• とりなす
  godan verb, transitive verbIntervening in the sense of mediating between people and smoothing things over, as when someone reconciles disputing parties. It is usually written in kana alone.
  先生せんせいが二人ふたりの学生がくせいの口論こうろんを取り成とりなした。↗

  The teacher intervened in the quarrel between the two students.
• 間に立つあいだにたつ
  expression, godan verbAn idiomatic expression for intervening by standing between two parties, as a go-between or mediator in a dispute or negotiation.
• 割って入るわってはいる
  expression, godan verbIntervening by wedging or pushing in between people, or by interrupting a conversation or quarrel. It suits someone stepping into an argument to break it up.
  「失礼しつれいですが」とアンが話はなしに割わって入はいった。↗

  "Excuse me," Ann broke in.
• 間に入るあいだにはいる
  expression, godan verbCovers stepping in or coming between two parties, often to act as an intermediary. Use it when someone positions themselves between disputing sides to mediate.

All five are less common ways to say 'intervene': use 「間に入る」 or 「間に立つ」 for mediating between parties, 「割って入る」 for wedging into a quarrel or conversation, 「とりなす」 for smoothing things over, and 「止めに入る」 for stepping in to stop something.

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

• 止めに入るとめにはいるto intervene
• とりなすto mediate
• 間に立つあいだにたつto mediate
• 割って入るわってはいるto wedge one's way in
• 間に入るあいだにはいるto act as an intermediary