Emperor Ninkō was the 120th Emperor of Japan, according to the traditional order of succession. Ninkō's reign spanned the years from 1817 until his death in 1846, and saw further deterioration of the ruling Shōgun's power. Disasters, which included famine, combined with corruption and increasing Western interference, helped to erode public trust in the bakufu government. Emperor Ninkō attempted to revive certain court rituals and practices upon the wishes of his father. However, it is unknown what role, if any, the Emperor had in the turmoil which occurred during his reign. His family included fifteen children from various concubines, but only three of them lived to adulthood. His fourth son, Imperial Prince Osahito became the next Emperor upon Ninkō's death in 1846. While political power at the time still resided with the Shōgun, the beginnings of the Bakumatsu were at hand.
Prince Ayahito was enthroned as Emperor on 31 October 1817, after his father retired from the throne. Following his father the Retired Emperor's wishes, he attempted to revive certain court rituals and practices. These included, among other things, restoring the title tennō, which identified the Emperor. Among Ninkō's innovations was the establishment of the Gakushūsho for the Court Nobility just outside the Imperial Palace. One major event during his reign was the Tenpō famine which lasted from 1833 to 1837. The famine was most severe in northern Honshū and was caused by flooding and cold weather. Ninkō's reign also saw some deterioration of the Shōgun's power. The Tenpō famine and other concurring natural disasters hit hard, and shook the faith of the people in the ruling Shōgun. In 1837, Ōshio Heihachirō led a revolt in Osaka against corrupt officials who refused to help feed the impoverished residents of the city. That same year also had an incident take place where an American merchant vessel was driven away by coastal artillery. While order was eventually restored, long term resentment resonated with the commoners against the ruling government. It is unclear though what role, if any, the Emperor played during this period of unrest. Emperor Ninkō died on 21 February 1846 and was enshrined in the Imperial mausoleum, Nochi no Tsukinowa no Higashiyama no misasagi, which is at Sennyū-ji in Higashiyama-ku, Kyoto. Also enshrined in Tsuki no wa no misasagi, at Sennyū-ji are this Emperor's immediate Imperial predecessors since Emperor Go-Mizunoo – Meishō, Go-Kōmyō, Go-Sai, Reigen, Higashiyama, Nakamikado, Sakuramachi, Momozono, Go-Sakuramachi, Go-Momozono and Kōkaku. The shrine complex also encompasses the misasagi of Ninkō's immediate successor – Kōmei. Empress DowagerYoshikō is also entombed at this Imperial mausoleum complex.
The years of Ninkō's reign are more specifically identified by more than one era name or nengō. While Kugyō is a collective term for the very few most powerful men attached to the court of the Emperor of Japan in pre-Meiji eras. Even during those years in which the court's actual influence outside the palace walls was minimal, the hierarchic organization persisted. The following eras occurred during Ninkō's reign:
Bunka
Bunsei
Tenpō
Kōka
During Ninkō's reign, this apex of the Daijō-kan included:
