noun
Jōganden (pavilion housing the empress's reception hall in the Heian Palace)
Historical term for a specific building within the inner Heian Palace complex. Often mentioned alongside other palace pavilions such as the Shichiden (七殿) and Jūshichiden (十七殿).
貞観殿は、平安宮内裏の十七殿の一つである。
The Jōganden is one of the seventeen pavilions of the inner Heian Palace.
The broader set of seventeen pavilions in the inner palace, including Jōganden.
The name 貞観殿 (Jōganden) is derived from the Jōgan era (859–877) during which it was built or named. The exact historical derivation is uncertain; the spelling is conventionally associated with this pavilion.