Glossary

Jōgan

貞観

Term · calendar

Japanese era name (貞観) for the years 859–877: 859 is Jōgan 1 (元年) and Jōgan 19 is 877. Jōgan (貞観) is a Japanese era name (nengō), proclaimed in 859. Its years are counted in lunar years from the new year before the proclamation: 859 is Jōgan 1 (元年), 877 its last year, Jōgan 19. A Japanese source dates a year within it as “Jōgan 2” (貞観2年) rather than by a continuous count. Before: Ten’an. After: Gangyō.