If you're looking for manga similar to Fuan no Tane*, you might like these titles.
A collection of very short and mostly atmospheric stories dealing with urban legends, ghosts, and superstitions all organized around a specific theme.
Includes the following chapters:
A group of young people who were hiking get stuck at an old shrine because of bad weather, and one by one they are killed by a monster who was sealed at a cave below the shrine.
After surviving a devastating motorcycle accident, Jun Tachikawa starts to hear mysterious voices. When Nagisa Hoshima returned home, there was a mysterious creature awaiting. This manga is for all the Cthulhu mythos fans around the world!