Chronos Ruler (時間の支配者, Jikan no Shihaisha, lit. "Time Ruler") is a Japanese manga series written and illustrated by Pon Jea. It began as a one-shot titled Jikan no Shihaisha (時間の支配者, lit. "Time Ruler"). It was released in 2011, and published in Shounen Jump NEXT!.
An anime television series adaptation by Project No.9 began airing on July 7, 2017.
The story centers on "Chronos Rulers," those who fight the time-eating demons that appear when people wish they could turn back time. The Chronos Rulers fight a time-manipulation battle against these demons.