Koumi Jima Shuu 7, also known as Koumi Island Weekly 7, is a Japanese manga series written and illustrated by Koume Otohira. The series was later adapted into an anime television drama in 2016. The story revolves around the daily lives of the residents on Koumi Island, a small island located off the coast of Nagasaki Prefecture.

Set on a fictional, isolated archipelago (the "Jima" of the title), the story follows a group of seven strangers who wake up in a deserted military bunker. They have no memory of how they arrived, but each possesses a unique tattoo corresponding to the seven deadly sins. Unlike mainstream survival manga like Battle Royale or Liar Game , Koumi Jima Shuu 7 allegedly eschews action for creeping, architectural horror.