Kagen no Tsuki (下弦の月, lit. Last Quarter of the Moon), sometimes known as Last Quarter and lesser known as Waning Moon, is a manga series created by Ai Yazawa. The manga was serialized in Ribon from 1998 until 1999. Shueisha published the series into three volumes.
A live-action film based on the manga was released in 2004. Geneon Entertainment licensed the film for release in North America, however the manga has yet to be released in English.