Rika Mayama (真山 りか, Mayama Rika, born on December 16, 1996) is a Japanese idol singer, and a member of the idol group Shiritsu Ebisu Chugaku.
Mayama performed one of the opening themes for the 2014 anime television series Akame ga Kill! ("Liar Mask", featured in episodes 15 and on). The song is a mix of J-pop and heavy metal.
