Mari Yaguchi
- Born
- 20 January 1983 (43 years)
- Place of birth
- Yokohama, Kanagawa Prefecture, Japan
- Gender
- Female
Mari Yaguchi (矢口 真里, Yaguchi Mari, January 20, 1983) is a Japanese female talent. She is a former Hello! Project member. She is managed by Up Front Create. Her ex-husband is actor Masaya Nakamura (中村 昌也).
