Information
- Japan standard time distribution service over analog telephone lines (Telephone JJY) ends March 31, 2024. (2023/3/15)
- No leap second will be introduced on July 1, 2023. (2023/1/10)
- The way to register using the Hikari-telephone JJY has changed. (2022/9/1)
Topics
LF Standard Time and Frequency Transmission Station
Notification: The schedule of suspension of the Hagane-yama LF Station (JJY:60kHz).(2023/4/18)
- Transmission Information of JJY signals
Contents
Welcome to Japan Standard Time (JST) Group. JST Group plays an important role in the Generation, Comparison, and Dissemination of Japan Standard Time and Frequency standard. Please choose the contents you'd like to use.
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