Gravitation (Japanese: グラビテーション, Hepburn: Gurabitēshon) is a yaoi manga series written and illustrated by Maki Murakami. The story follows the attempts of Shuichi Shindo and his band, Bad Luck, to become Japan's next musical sensation, and his struggles to capture Eiri Yuki's heart.

The manga was published by Gentosha and was serialized on Kimi to Boku starting in 1996 and ending in 2002. The manga has been licensed and published in English by Tokyopop, as well as a light novel. There is also the Gravitation Collection which consists of 6 volumes, each of which has two original volumes of Gravitation in it. A sequel, Gravitation EX. (グラビテーションＥＸ．, Gurabitēshon EX.), was published in the web magazine Genzo from 2004 to 2009 and returned in 2011 to Web Spica.

Gravitation has also been adapted into a two episode OVA series in 1999 directed by Shinichi Watanabe and a thirteen-episode anime television series directed by Bob Shirohata. The TV series aired in Japan from October 4, 2000 to January 10, 2001, on WOWOW Wednesdays at 18:30 and was reaired on Tokyo MX in 2007. The anime goes to roughly volume 7 of the manga. Both have been licensed for North American release by Nozomi Entertainment.