Ninji

Ninji, also called Jinji, was a Japanese [era name] after En'ō and before Kangen. This period spanned the years from August 1240 to January 1243. The reigning emperors were Emperor Shijō and Emperor Go-Saga.

Change of era

1240 Ninji gannen: The era name was changed to mark an event or a number of events. The previous era ended and a new one commenced in En'ō 2.
Events of the ''Ninji'' era
1242 : In the 10th year of Shijō-tennōs reign, the emperor died suddenly; and despite a dispute over who should follow him as sovereign, contemporary scholars then construed that the succession was received by the second son of former Emperor Tsuchimikado.
1242 : Emperor Go-Saga is said to have acceded to the throne.
July 14, 1242 : Hōjō Yasutoki died at age 60. From Gennin 1, or during 19 years, Yasutoki had been the regent or prime minister of the Kamakura shogunate. Yasutoki's son, Hōjō Tsunetoki succeeded him as shikken, but Kujō Yoritsune himself took charge of the bakufu.