Accession of Emperor Kōmei after the death of Emperor Ninkō

Background. Emperor Ninkō, the 120th emperor, died on 21 February 1846. His reign, spanning from 1817, witnessed the deterioration of the ruling shōgun's power. Ninkō was enshrined in the Imperial mausoleum at Sennyū-ji in Kyoto. His fourth son, Prince Osahito, succeeded him. Before accession, Osahito held the title Hiro-no-miya. The transition occurred amidst the political context of the Edo period, setting the stage for Kōmei's reign.

Succession. Prince Osahito became Emperor Kōmei upon Ninkō's death in 1846. He was enthroned on 10 March 1846, becoming the 121st emperor according to traditional succession. Kōmei's reign spanned from 1846 through 1867, corresponding to the final years of the Edo period. The accession marked a shift in imperial authority, though the specific political dynamics of the shogunate's surrender of sovereignty are noted in broader contexts.

Historical Context. The accession occurred during a period of internal turmoil and foreign contact, particularly with the United States. While Kōmei later asserted imperial powers against the Tokugawa clan, the immediate event was the succession itself. Kōmei was the last emperor to receive a posthumous name chosen after his death, a practice that changed with his successor. The event is situated within the broader Edo period imperial court structure.