Nichijou is a Japanese manga series written and illustrated by Keiichi Arawi. The manga began serialization in the December 2006 issue of Kadokawa Shoten's manga magazine Shōnen Ace, and was also serialized in Comptiq between the March 2007 and July 2008 issues. Kadokawa Shoten later published all chapters of the series' initial run in ten tankōbon volumes from July 2007 to December 2015. After a six-year hiatus, the manga began serialization again in 2021.

Kadokawa Shoten (角川書店), formerly the Kadokawa Shoten Publishing Co., Ltd. , is a Japanese publisher and division of Kadokawa Future Publishing based in Tokyo, Japan. It became an internal division of Kadokawa Corporation on October 1, 2013. Kadokawa publishes manga, light novels, manga anthology magazines such as Monthly Asuka and Monthly Shōnen Ace, and entertainment magazines such as Newtype. Since its founding, Kadokawa has expanded into the multimedia sector, namely in video games and in live-action and animated films.