Mari Yaguchi
was a sub-unit of the Japanese idol girl groups Morning Musume and Coconuts Musume. It was formed by Up-Front Promotion in 2000 and associated with Hello! Project. The group was founded by Morning Musume members Mari Yaguchi, Nozomi Tsuji, and Ai Kago, with Coconuts Musume member Mika Todd later added as a member. After Yaguchi's departure, Morning Musume member Ai Takahashi was added into the group.