Ikigami: The Ultimate Limit is a Japanese manga series written and illustrated by Motoro Mase. The manga was serialized in Shogakukan's Weekly Young Sunday (2005–2008) and Weekly Big Comic Spirits (2008–2012). A national prosperity law has been passed in a dystopian nation resulting in citizens between the ages of 18 and 24 being randomly selected to die for the good of the nation. These citizens are given 24-hour notification of their impending death. These notifications are known as "ikigami"—the ostensible reason for this system being to help demonstrate the value of life. The manga was adapted into a live-action film titled Ikigami in 2008 with Tomoyuki Takimoto as its director.