What's New
What's New
Announcement: Suspension of broadcast of standard radio signals from Hagane-yama transmission station due to antenna construction. (Links to a Japanese page) (2024/12/16)Announcement: Suspension of broadcast of standard radio signals from Hagane-yama transmission station due to antenna line inspection. (Links to a Japanese page) (2024/10/25)Periodic maintenance of facilities in the LF Standard Time and Frequency Transmission Stations will be performed. (Links to a Japanese page) (2024/8/20)The URL of Japan Standard Time in large letters has been changed, so please be careful when you use it.
The new URL is as follows.
https://www.nict.go.jp/JST/JST6_E/ (2024/4/22)
The Time Dissemination by Telephone (TEL-JJY) ended on March 31, 2024 As previously announced, we have completed updating the servers used for public NTP services, so all public NTP servers no longer support NTP version 1.
Therefore, if you are using NTP version 1, please migrate to NTP version 2 or later. (2024/3/14)
No leap second will be introduced on July 1, 2024. (2024/1/9)"Telephone JJY" will be completely replaced with "Hikari Telephone JJY" on April 1, 2024. Notification: The schedule of outages of the Standard Time and Frequency Transmission Station. (Links to a Japanese page) （2023/12/7）Information about the temporary outages of transmission at Hagane-yama LF Standard Time and Frequency Transmission Station due to the renewal of airplane warning lights. (Links to a Japanese page) (2023/10/25)Periodic maintenance of facilities in the LF Standard Time and Frequency Transmission Stations will be performed. (Links to a Japanese page) (2023/8/29)No leap second will be introduced on January 1, 2024. (2023/7/10)Notification: The schedule of suspension of the Hagane-yama LF Station (JJY:60kHz). （2023/4/18）Notification: The schedule of suspension of the Ohtakadoya-yama LF Station (JJY:40kHz). （2023/3/28）Japan standard time distribution service over analog telephone lines (Telephone JJY) ends March 31, 2024. The schedule of the suspension of transmission due to the repair work of the antenna equipment of
the Ohtakadoya-yama LF station (40 kHz) (2023/2/15)
No leap second will be introduced on July 1, 2023. (2023/1/10)The schedule of transmission suspend of the wave which has been postponed due to the impact of the typhoon 11th fixed. （2022/11/8）
The schedule of the periodic maintenance of facilities in the LF Standard Time and Frequency Transmission Station has partly been postponed. （2022/10/7）
Simultaneous suspension of both LF Standard Time and Frequency Transmissions due to Typhoon No. 11 （2022/9/12）
The way to register using the Hikari-telephone JJY has changed. (2022/9/1)Holding information of Universal Communication Research Institute Open House 2022 (Kobe) (2022/7/27)No leap second will be introduced on January 1, 2023. (2022/7/6)Periodic maintenance of facilities in the LF Standard Time and Frequency Transmission Stations will be performed as informed. (Links to the Japanese page) (2022/7/1)
NICT Open House 2022 has been finished. Some of the on-line contents are still available now. (Until November 30, 2022) (2022/6/29)
Press Release： World's first use of the "Optical lattice clock" to maintain National standard time. （2022/6/10）Holding information of NICT Open House 2022 （2022/6/10）At the 20th anniversary of the Haganeyama Transmission Station, we received a large number of reports (140 in Japan and 8 overseas). Thank you for your cooperation. Time dissemination service using http/https was terminated as of March 31, 2022. Time dissemination service using http/https will end on March 31, 2022. Break schedule from May 2021 Ohtakadoya-yama LF Standard Time and Frequency Transmission Station will have a temporary stop of transmission due to an extra maintenance of the antenna during the time below. No leap second will be introduced on July 1, 2022. (2022/1/6)
