Jōgan era (859.4.15-877.4.16)
Jōgan period (of art history, 859-877 CE)
simultaneous contemplation of the threefold truth (form of Tendai meditation)
pavilion housing the empress's reception hall (in the inner Heian Palace)
Kōnin-Jōgan period (of Japanese art history, approx. 794-894 CE)
Sanriku earthquake of 869 CE