Mari Yaguchi

is a Japanese singer, actress, and television personality. She joined the girl group Morning Musume in 1998 as a second generation member and was the leader of subgroups within Hello! Project, such as Mini-Moni, Morning Musume Sakuragumi, and ZYX. After leaving Morning Musume in 2005, Yaguchi has continued to appear on television in dramas and variety shows. Career 1998-2005: Morning Musume Yaguchi became a member of Japanese idol girl group Morning Musume during the second generation auditions in 1998. In 1998, she also became a member of Tanpopo, one of Morning Musume's sub-groups. During her time with Morning Musume, her solo line "Sexy Beam" from their 2000 single "Koi no Dance Site" became a media phenomenon and became closely associated with her. In late 2000, Yaguchi founded Mini-Moni, a sub-group of Morning Musume and Coconuts Musume featuring members who are 150 cms. and shorter, as their leader. She left the group in 2002 after the release of Mini-Moni the Movie: Okashi na Daibōken!, which explained a fictional account behind her reasons for leaving. In 2003, she participated in the girl groups ZYX, Romans, and Morning Musume Sakuragumi.