Japan standard time

Before the Meiji era —each local region had its own time zone in which noon was when the sun was exactly at its culmination.

Standard Time in Japan is legally defined to represent the local time at the th eastern meridian, an arrangement that originated in the Meiji era and dates back as far as [1]. Considering that Earth rotates degrees in 24 hours, this means that time in Japan is exactly 9 hours ahead of the time in Greenwich, which used to provide the standard known as Greenwich Mean Time GMT , based on exact astronomical measurements. Today, the international time scale of Coordinated Universal Time UTC is based on precise atomic clocks, but the 9-hour time difference of Japan Standard Time has been maintained. The Japanese Ministry of Internal Affairs and Communications MIC is responsible for providing standard frequencies, transmitting standard radio waves, and reporting standard time [2]. These tasks have been assigned to us at the National Institute of Information and Communications Technology NICT , where we create, distribute and compare Japan Standard Time signals, both nationally and internationally. Since we interact with time most directly through the change of day and night or the change of seasons, the original units of time were linked to the rotation of the Earth and its motion around the sun.

Japan standard time

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This maintains the accuracy of the atomic definition of the second, while keeping time sufficiently consistent with Earth's rotation. The two accurate time scales generated in Tokyo and Usphonebook are continuously compared.

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Tokyo , Kyoto , Osaka , Yokohama. Want to see the time in Japan compared with your home? Choose a date and time then click "Submit" and we'll help you convert it from Japan time to your time zone. Convert Time From Japan to any time zone. Need to compare more than just two places at once? Try our World Meeting Planner and get a color-coded chart comparing the time of day in Japan with all of the other international locations where others will be participating.

Japan standard time

Standard Time in Japan is legally defined to represent the local time at the th eastern meridian, an arrangement that originated in the Meiji era and dates back as far as [1]. Considering that Earth rotates degrees in 24 hours, this means that time in Japan is exactly 9 hours ahead of the time in Greenwich, which used to provide the standard known as Greenwich Mean Time GMT , based on exact astronomical measurements. Today, the international time scale of Coordinated Universal Time UTC is based on precise atomic clocks, but the 9-hour time difference of Japan Standard Time has been maintained.

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Download as PDF Printable version. Tools Tools. Today, the international time scale of Coordinated Universal Time UTC is based on precise atomic clocks, but the 9-hour time difference of Japan Standard Time has been maintained. Universal Communication Research Institute. In other projects. Services and Applications available. Latest News. Fixed Term Administrative Specialist. Standard Time in Japan is legally defined to represent the local time at the th eastern meridian, an arrangement that originated in the Meiji era and dates back as far as [1]. Researcher and Research Engineer.

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Contents move to sidebar hide. Article Talk. Categories : Time in Japan Time zones. Permanent Researcher for new master's graduate. Permanent Research Engineer. Read Edit View history. But if this location is affected by a natural disaster or other emergency, time scale generation might stop due to infrastructure damage. Since then, the two time scales have drifted apart. The two accurate time scales generated in Tokyo and Kobe are continuously compared. Japan is located at the th eastern meridian.