Chameleon

is a Japanese manga series created by Atsushi Kase which was serialized in Kodansha's Weekly Shōnen Magazine between 1990 and 1999; forty-seven tankōbon were released.The manga won the twenty-third round of the Kodansha Manga Award in 1999 for shōnen manga, beating out titles such as One Piece and Karakuri Circus.

It was adapted into an OVA series consisting of six 50-minute episodes running from 1992 to 1996 produced by Tanaka Productions.I t was also adapted into a live-action film directed by Noboru Matsui and starring Hosei Yamazaki as Eisaku Yazawa in 1996.

Chameleon Seven Years After was published through Weekly Shōnen Magazine on 6 November 2013. A sequel titled Kuro Ageha (くろアゲハ, lit. "Black Swallowtail") started to be serialized in the following issue. It has spawned two tankōbon volumes published on 16 May, and 17 July 2014.