Records of historical earthquakes and tsunami extend further back in time in Japan than any other country that lies along the Pacific Rim (the first documented event occurred in 416 AD).
These historical documents supported the date verification of the 1700 Cascadia earthquake that occurred off the Pacific Northwest coast of North America.
The issue of earthquakes in Japan was made a priority following the 1854 Ansei-Nankai event that brought great destruction to the southwest portion of the country.
With the onset of the Meiji period, the feudal government system was superseded by an empire that began to focus on advancing the Japanese society up to Western standards, especially in science.
[6] While the government brought in foreign experts (yatoi) during the building of the country's modern infrastructure, the high seismicity in Japan proved to be an ideal laboratory setting during the establishment of the new science of seismology.
Shortly thereafter, the Japanese had their own organization (the Japan Meteorological Agency) that had taken control of an earthquake reporting system that was initially created by Milne.
Ultimately, the system and the 1891 earthquake provided data by which seismologist Fusakichi Omori developed a law of decay for aftershocks.
The surface rupture did not extend over the full distance of the individual faults, but the Nukumi segment ran 20 km (12 mi) with a maximum offset of 3 m (9.8 ft).
The cities of Gifu and Ogaki experienced heavy damage, due largely to fire, but Osaka and Nagoya were also significantly affected.