間あいだに入はいる

expression, godan verb (-ru)

act as an intermediary; step in; intervene

Used when a person inserts themselves between two parties to mediate, interrupt, or help. Can be physical or figurative.

• 彼かれが二人ふたりの喧けん嘩かの間あいだに入はいって仲ちゅう裁さいした。

  He stepped in between the two fighting and mediated.

• 交こう渉しょうが難なん航こうしたので、弁べん護ご士しが間あいだに入はいった。

  The negotiations were difficult, so a lawyer acted as an intermediary.