定てい時じ性せい

noun

punctuality; on-time performance; reliability

Primarily used in the context of public transportation schedules, referring to how reliably services run on time. Can also refer to general reliability in timing.

• 日本にほんの鉄てつ道どうは定てい時じ性せいが高たかいことで知しられている。

  Japanese railways are known for their high punctuality.

• このバス路ろ線せんは定てい時じ性せいに問もん題だいがある。

  This bus route has issues with on-time performance.