先せん陣じんを切きる

expression, godan verb (-ru)

take the lead; spearhead; be the first to act

Idiomatic expression used when someone initiates an action, leads a charge, or is the first to do something, often in competitive or pioneering contexts.

• 彼かれは新しんプロジェクトの先せん陣じんを切きって、チームを引ひっ張ぱった。

  He took the lead on the new project and pulled the team along.

• その企き業ぎょうは環かん境きょう技ぎ術じゅつの分ぶん野やで先せん陣じんを切きっている。

  That company is spearheading the field of environmental technology.