, fully titled in Japan, is a horror seinen manga written and illustrated by Junji Ito. Appearing as a serial in the weekly manga magazine Big Comic Spirits from 2001 to 2002. Shogakukan collected the chapters into two bound volumes from February 2002 to May 2002. The story revolves around a couple, Tadashi and Kaori, as they fight to survive against a mysterious horde of fish with metal legs powered by an odor known as the "death stench". The work also includes a pair of bonus stories, titled "The Sad Tale of the Principal Post" and "The Enigma of Amigara Fault".
Viz Media published an English-language translation of the two volumes in North America from September 2003 to March 2004 and re-released it from October 2007 to January 2008. An anime adaptation by Ufotable was released on February 15, 2012.