Operating Status of Japan Standard Time and Standard Radio Signals

  • 日本語
  • Print this page
Space-Time Standards Laboratory
The generation and distribution of Japan Standard Time is one of the tasks of NICT's Space-Time Standards Laboratory. Visit our website for more information!

Operational Status Information

News and Announcements

サムネール

December 16, 2024

Announcement: Suspended broadcast of standard radio signals from Hagane-yama transmission station due to antenna construction

サムネール

October 25, 2024

Announcement: Suspended broadcast of standard radio signals from Hagane-yama transmission station due to antenna line inspection

サムネール

August 24, 2024

Notice of simultaneous outage at both standard radio signal stations

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

サムネール

May 15, 2025

NTP server scheduled network maintenance (2025-5-15)

サムネール

May 1, 2025

NTP server scheduled network maintenance (2025-5-1)

サムネール

March 14, 2025

NTP server scheduled network maintenance (2025-3-14)

Public NTP Server status information
Archive

Hikari Telephone JJY

サムネール

February 1, 2019

Full-scale operation of "Hikari Telephone JJY" system has begun

Hikari Telphone JJY status information
Archive

Telephone JJY

サムネール

April 1, 2024

The Time Dissemination by Telephone(TEL-JJY) ended on March 31, 2024

Telephone JJY status information
Archive

Contact

Email : horonet@ml.nict.go.jp
Phone : 042-327-6985

Electromagnetic Standards Research Center
 Space-Time Standards Laboratory
  Japan Standard Time Group

Access - Directions to NICT's Koganei Headquarters