Ninju

Ninju was a Japanese era name used from 851 to 854 during the reign of Emperor Montoku. It followed Kashō and preceded Saikō.

Emperor Montoku: The 55th emperor of Japan, who reigned from 850 to 858. Ninju was adopted during Montoku’s reign.
Japanese imperial succession: The historical sequence of rulers in Japan’s imperial institution. Ninju’s dates are anchored to Emperor Montoku’s reign.
Japanese historical dating: The methods used to express and interpret dates in Japanese historical sources. Ninju identifies dates in records produced during 851–854.
Kōnin: A Japanese era name used from 810 to 824, during Emperor Saga’s reign. Kōnin is a different era name, separated from Ninju by several decades.
Saikō: A Japanese era name used from 854 to 857, immediately after Ninju. Saikō continued the era-name sequence after Ninju ended.
Japanese regnal era: A period identified by an emperor’s reign, distinct from an era name that can change within a reign. Montoku’s reign contained multiple era names, including Ninju.
Japanese nengō system: The system of assigning era names to periods in Japanese chronology. Ninju exemplifies how a nengō labels years within an emperor’s reign.
Jōgan: A Japanese era name used from 859 to 877, after the Jōwa era. Jōgan belongs to a later period than Ninju and a different emperor’s reign.
Heian period: A period of Japanese history conventionally dated from 794 to 1185. Ninju falls within the Heian period’s early centuries.
Japanese era-name chronology: The ordered historical sequence of era names used in Japan. It places Ninju between Kashō and Saikō.

Linked from 2 pages

Ten'anRelated: Ninju was the era name immediately before Ten'an.