Sayashi Riho (鞘師里保) is a Japanese pop singer under Hello! Project. She is a former ninth generation member of the Japanese pop group Morning Musume and a former member of the duo Peaberry. Known for her wabi-sabi personality, she has been most popular out of the recent additions. Starting with "Only you", her second single as a Morning Musume member, she was pushed into becoming one of the group's central figures and one of the main vocalists.