Rika Mayama, known in Japanese as 真山りか, is a Japanese idol singer and a member of Shiritsu Ebisu Chugaku. Born on December 16, 1996, in Tokyo, she has built her career in Japanese idol pop, where group vocals, synchronized performance, and bright, upbeat songs are central. She is associated with Defstar Records and maintains an official website at mayamarika.com.
As part of Shiritsu Ebisu Chugaku, Mayama represents the ensemble-driven side of contemporary Japanese idol music. In 2026, she also attracted attention with the announcement of her second photobook, Machiawase (まちあわせ), with title and cover visuals revealed alongside preview cuts. The project added a separate chapter to her career beyond group activity and gave fans another way to follow her public image as an idol performer.
