成せい功こうの鍵かぎ

expression, noun

key to success; key success factor

A set phrase meaning the crucial element or factor that leads to success.

• 努ど力りょくこそが成せい功こうの鍵かぎだ。

  Effort is the key to success.

• このプロジェクトの成せい功こうの鍵かぎはチームワークです。

  The key to this project's success is teamwork.