Monogatari (物語, "Story") is a Japanese light novel series written by Nisio Isin and illustrated by Vofan. The plot centers on Koyomi Araragi, a third-year high school student who survives a vampire attack and finds himself helping girls involved with a variety of apparitions, ghosts, beasts, spirits, and other supernatural phenomena, which often serve as proxies for their emotional and mental issues. Since November 2006, Kodansha published 29 volumes in the series under its Kodansha Box imprint. All of the series' story arcs share the common title suffix -monogatari (物語).

Shaft has animated the Monogatari series several times since 2009. The first season of the anime adaptation consists of 30 episodes, which were broadcast in Japan between July 2009 and December 2012. The second season consists of 28 episodes broadcast between July and December 2013, and the third and final season consists of 42 episodes broadcast between December 2014 and June 2019. A prequel anime film trilogy, Kizumonogatari, was released in 2016 and 2017. A manga adaptation, illustrated by Oh! great and titled Bakemonogatari, began serialization in Kodansha's Weekly Shōnen Magazine in March 2018, and ended in March 2023.