Karoku (嘉禄) was a Japanese era name (年号, nengō, lit.
"year name") after Gennin and before Antei.
This period spanned the years from April 1225 to December 1227.
[1] The reigning emperor was Go-Horikawa-tennō (後堀河天皇).
[2] This article about a Japanese era name is a stub.