noun
permanence; perpetuity; long continuance
Abstract noun referring to a state of lasting forever or continuing for a very long time. Often used in formal or literary contexts.
平和の長久を願う。
We wish for the permanence of peace.
この制度の長久は保証
The perpetuity of this system is not guaranteed.
noun
Chōkyū era (1040.11.10-1044.11.24)
A specific Japanese historical era name. Used only in historical contexts.
長久年間に起きた出来事を調べている。
I am researching events that occurred during the Chōkyū era.