Eishō (永正) was a Japanese era name (年号,, nengō,, lit. "year name") after Bunki and before Daiei. The period started in February 1504 and ended in August 1521.[1] During this time, the emperor was Go-Kashiwabara-tennō (後柏原天皇).[2]
21 September 1510 (Eishō 7, 18th day of the 8th month): Earthquake at Seionaikai (Latitude: 34.600/Longitude 135.400), 6.7 magnitude on the Richter Scale.[5]
10 October 1510 (Eishō 7, 8th day of the 9th month): Earthquake in the Enshunada Sea (Latitude: 34.500/Longitude: 137.600), 7.0 on the Richter Scale.[5]
♯The Northern pretenders did not recognize the Genkō era. Gentoku was used in the Northern Court until 1332. ₪The Shōkyō era was recognized only by the Northern pretenders, not by the Southern Court. ‡ Upon reunification of the Northern and Southern Courts in 1392, Genchū was discontinued. Meitoku was used until 1394.