noun
Eiroku era (1558.2.28–1570.4.23)
A Japanese era name (年号) spanning from the 28th day of the 2nd month of 1558 to the 23rd day of the 4th month of 1570 in the lunar calendar.
永禄年間には、桶狭間の戦いが起こった。
The Battle of Okehazama took place during the Eiroku era.