Japan Standard Time Group



LF Standard Time and Frequency Transmission Station


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.

What's New
What we do
The Information of Standard-time and Frequency-signal Emission (JJY) (The users of radio wave clock see here for more information, please)
Time Dissemination Service (NTP,TEL-JJY,Time Business,calibration)
FAQs and Data

Contact Us

Please contact us if you have any questions, comments, corrections, or suggestions.