Kōka (弘化) was a Japanese era after Tempō and before Kaei and spanned from December 2 (?), 1844 to February 28 (?), 1848. The reigning emperors were Ninkō and Kōmei. Japanese era name (年号, nengō, lit. ... Tempō (天保) was a Japanese era after Bunsei and before Kōka and spanned from December 10 (?), 1830 to December 2 (?), 1844. ... Kaei (嘉永) was a Japanese era after Kōka and before Ansei and spanned from February 28 (?), 1848 to November 27 (?), 1854. ... 1844 was a leap year starting on Monday (see link for calendar). ... 1848 is a leap year starting on Saturday (link will take you to calendar). ... Emperor Ninkō (仁孝天皇) (March 16, 1800 – February 21, 1846) was the 120th imperial ruler of Japan. ... Emperor Kōmei of Japan Emperor Kōmei (孝明天皇) (July 22, 1831 - January 30, 1867) was the 121st imperial ruler of Japan. ...

Change of Era

Due to a fire at Edo Castle, on December 2 (?), Tempō 15 (1844), the era was changed to Kōka (roughly "Becoming wide/vast"). Moat, wall, and building at Edo Castle Stone foundation of the main tower at Edo Castle. ...

Kōka	1st	2nd	3rd	4th	5th
Gregorian	1844	1845	1846	1847	1848

Also http://www.kokasexton.com Koka is the name of the website owner.