Ōoku: The Inner Chambers is a Japanese manga series written and illustrated by Fumi Yoshinaga. It was serialized in Hakusensha's manga magazine Melody from June 2004 to December 2020, with its chapters collected in 19 tankōbon volumes. The manga is licensed in North America by Viz Media. Ōoku: The Inner Chambers follows an alternate history of early modern Japan in which an unknown disease kills most of the male population, leading to a matriarchal society in which the Ōoku becomes a harem of men serving the now female Shogun.