Kaei

was a after "Kōka" and before "Ansei". This period started in February 1848 and ended in November 1854. During this time, the emperor was . 
The "nengō" "Kaei" means "Celebration of Eternity" or "Eternal Felicity"
Events of the "Kaei" Era.
During the "Kaei" era, the shogunate bought guns and encouraged the manufacture of guns.