Widespread use of radio-controlled clocks and other devices in Japan: Standard time signal recognized as IEEE Milestone NICT
おおたかどや山標準電波送信所（Otakadoyayama Standard Time and Frequency Radio Wave Transmitting Station）
The standard time signal with the call sign JJY, which the National Institute of Information and Communications Technology (NICT) inherited from its predecessor organization, has been recognized as an IEEE Milestone. Since the establishment of the world’s second standard time signal station in 1940, JJY has enabled Japan’s broadcasting, power, transportation, and other infrastructure systems to share common time and frequencies, and is still used today in radio-controlled clocks and other devices.
In particular, LF standard time signals contain time codes, and radio-controlled clocks that automatically adjust the time using these codes are widely used in Japan.
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