Japanese era name
The Japanese era name (Japanese: 元号, Hepburn: gengō; "era name") or nengō (年号, year name), is the first of the two elements that identify years in the Japanese era calendar scheme. The second element is a number which indicates the year number within the era (with the first year being "gan (元)", meaning "origin, basis"), followed by the literal "nen (年)" meaning "year".