Tokugawa Ieyoshi was the 12th shōgun of the Tokugawa shogunate of Japan.

Ayahito , posthumously honored as 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 power of the ruling Shōgun. Disasters, which included famine, combined with corruption and increasing Western interference, helped to erode public trust in the bakufu government. Emperor Ninkō revived 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.