一ひと筋すじ道みち

noun

straight road; single straight path

Refers to a road or path that runs straight without branching, often used literally but can also imply a single-minded course of action in figurative contexts.

• この一ひと筋すじ道みちをまっすぐ行いけば駅えきに着つきます。

  If you go straight along this road, you'll reach the station.

• 彼かれは一ひと筋すじ道みちの人じん生せいを歩あゆんできた。

  He has lived his life on a single straight path.