Operating Status of Japan Standard Time and Standard Radio Signals
Operational Status Information
News and Announcements


Service Announcements
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Current status of JJY Standard Radio Time and Frequency Signals
Current transmission status
JJY Standard Radio Time and Frequency Signals
40kHz: Ohtakadoya-yama Station (Fukushima prefecture)
60kHz: Hagane-yama Station (Fukuoka / Saga prefecture)
Public NTP Server

May 15, 2025

March 14, 2025
Public NTP Server status information
Archive
Hikari Telephone JJY

February 1, 2019
Full-scale operation of "Hikari Telephone JJY" system has begun
Hikari Telphone JJY status information
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Telephone JJY
Telephone JJY status information
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Contact
: horonet![]() |
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Phone | : 042-327-6985 |
Electromagnetic Standards Research Center
Space-Time Standards Laboratory
Japan Standard Time Group
Access - Directions to NICT's Koganei Headquarters