Tsukuyomi: Moon Phase(月詠,Tsukuyomi) is a manga series by Keitarō Arima about a young vampire girl named Hazuki and a Japanese freelance photographer Kouhei Morioka whom Hazuki attempts to make into her servant.

The manga was adapted into a 25 episode anime TV series by the Shaft studio and aired late night on TV Tokyo from October 4, 2004 to March 28, 2005, followed by an additional 26th episode released only on DVD on February 22, 2006 which featured Art from Type-Moon. The OVA storyline has very little to do with the original series outside of having some of the same characters, and has a completely different storyline which does not fit into anything which came before it.