JMA seismic intensity data cover the period from 1919 to the present day. The information has been adjusted for maximum accuracy, but may also be subject to future modification. Station names and codes are valid as of 13 July 2023.
References
Ishigaki Yuzo, and Takagi Akimichi (2000): JMA Seismic Intensity Database and Several Operational Examples (in Japanese), Quart J. Seis., 63, 75 – 92.