What a Wonderful World! is a Japanese manga series written and illustrated by Inio Asano. It consists of loosely connected short stories about young adults in modern Japan and their life decisions. The manga was serialized in Shogakukan's seinen manga magazine Monthly Sunday Gene-X from 2002 to 2004 and is licensed in North America by Viz Media.

Inio Asano is a Japanese manga artist. Asano created the acclaimed manga series Solanin, which was released as a feature film in Japan in April 2010, starring Aoi Miyazaki. He is also famous for the series Goodnight Punpun and Dead Dead Demon's Dededede Destruction.