every hour; hourly
Used as a noun or adverb to indicate something occurs each hour. Common in schedules, reports, and news.
このバスは毎時0分に出発します。
This bus departs every hour on the hour.
This typhoon is moving north at a speed of 20 kilometers per hour.
The weather forecast is updated hourly.
This train departs from the platform on the hour, every hour.