A Spirit of the Sun (Japanese: 太陽の黙示録, Hepburn: Taiyō no Mokushiroku, lit. "The Sun's Revelation") is a Japanese manga series written and illustrated by Kaiji Kawaguchi. It is about a resourceful boy, Genichiro Ryu, as he survives a series of natural disasters and collapse of the economy in Japan set in the beginning of the 21st century. It was serialized in Shogakukan's Big Comic from 2002 to 2008. It was followed by a second part, serialized in the same magazine from 2008 to 2010. The series was adapted into a 2-episode anime television special produced by Madhouse in 2006.