"Kappa", as a late work of Ryunosuke Wasagawa, contains the strong feelings of Ryusuke Wasagawa's criticism of society, Sukekawa depicts a bizarre and fantasy Kappa country world, using the art of mapping, showing the darkness of Japanese society and the ugly side of society, this article analyzes the world-weary thoughts contained in the story through the storyline in the novel "Kappa" and the main characters in the story.