Nana is a Japanese manga series written and illustrated by Ai Yazawa. It was serialized in the monthly shōjo manga magazine Cookie from May 2000 to May 2009 before going on hiatus. The series centers on Nana Osaki and Nana Komatsu, two women who move to Tokyo at the age of 20, with the story focused on Nana O.'s pursuit for fame and Nana K.'s pursuit for romance, all while struggling to maintain their friendship.

Shojo Beat is a shōjo manga magazine formerly published in North America by Viz Media. Launched in June 2005 as a sister magazine for Shonen Jump, it featured serialized chapters from six manga series, as well as articles on Japanese culture, manga, anime, fashion and beauty. After its initial launch, Shojo Beat underwent two redesigns, becoming the first English anthology to use the cyan and magenta ink tones common to Japanese manga anthologies. Viz launched a related imprint of the same name for female-oriented manga, light novels and anime.