Gekiga (jap. dramatic pictures) is a form of comics originated in Japan after World War II by Yoshihiro Tatsumi (1935-2015), Masahiko Matsumoto (1934–2005), and Osamu Tezuka (1928–1989).

Coming from the background of prewar coloured manga, the young artists drew stories for teenagers who, like themselves, had experienced war. As opposed to the heroes of their childhood, the characters that they created were ordinary people who had dramatic adventures while living in ruined cities. This ‘alternative manga’ gained a wide following and exerted considerable influence on popular culture artists from the 1960s onwards. Mainstream publishers absorbed gekiga’s realistic style and adult content, especially in the seinen manga aimed at young men. Historical, erotic, thriller, horror and many other genres were transformed by gekiga, which also proved a formative influence for many leading figures in modern manga and anime, such as Hayao Miyazaki's Spirited Away. In recent years the work of gekiga artists has been translated into many languages and gained fans around the world.

The exhibition at the Manggha Museum is a retrospective ranging from the earliest days of the genre to its most celebrated achievements, such as Astro Boy.