Kan'ei(寛永) was a Japanese era name(年号,,nengō,, lit. "year name") after Genna and before Shōhō. This period started in February 1624 and ended in December 1643. During this time, the emperors and empress were Go-Mizunoo-tennō(後水尾天皇), and Meishō-tennō(明正天皇).
1638 (Kan'ei 15): Christian religion was made illegal in Japan.
1643 (Kan'ei 20): An ambassador from the king of Korea was received in Heian-kyō.
10 November 1643 (Kan'ei 20, 29th day of the 9th month): In the 15th year of Empress Meishō's reign (明正天皇15年), the empress abdicated; and her brother became Emperor Go-Komyō in ceremonies of senso and sokui.
Hayashi Razan and his son wrote Kan'ei shoka kezuden in 1641-1643. The shogun ordered the writing of this history of the great clans of Japan.
♯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.