Operating Status of Japan Standard Time and Standard Radio Signals
News and Announcements
January 16, 2026
January 8, 2026
January 7, 2026
Service Announcements
Archive
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
Public NTP Server status information
Archive
Hikari Telephone JJY
December 12, 2025
Scheduled system maintenance of Hikari Telephone JJY（2025-12-12）
December 1, 2025
Hikari Telphone JJY status information
Archive
Telephone JJY
Telephone JJY status information
Archive
Contact
: horonet |
|
| Phone | : 042-327-6985 |
Electromagnetic Standards Research Center
Space-Time Standards Laboratory
Japan Standard Time Group
Access - Directions to NICT's Koganei Headquarters