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)
- "Telephon JJY" service is due to end at the end of March, 2024. (2019/1/28)
Topics
LF Standard Time and Frequency Transmission Station
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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