is a disaster novel by Japanese writer Sakyo Komatsu, published in 1973. Komatsu took nine years to complete the work. It was published in two volumes, both released at the same time. The novel received the 27th Mystery Writers of Japan Award and the Seiun Award for a Japanese novel-length work. The English translation was first published in 1975. In 1995, after the Osaka-Kobe earthquake, a second English edition () was published. The English translation is heavily abridged. In 2006, a sequel to the novel, co-authored with Kōshū Tani, was published.