Name: Yasuda Kei (保田圭)

| Nickname: Kei-chan, Kemeko, Aunty, Yasuda-daimyoujin (Yasuda-high-priestess)
| Birth Date: 1980-12-06
| Birth Place: Chiba Prefecture, Japan
| Blood Type: A
| Height: 158.5 cm (5′2.4″)
| Hobbies: Enjoying movies, drawing, organizing photos
| Special skills: Playing electronic organ and saxophone
| Favorite colors: Red, pink
| Favorite flowers: Roses, margarets, sunflowers
| Favorite seasons: Summer
| Favorite food: Yakiniku, soft roe, kimchee, nattou, chocolate
| Disliked food: Shallots, milk, cheesecake
| Favorite movies: Pulp Fiction, Charlie’s Angels, Schindler’s List, etc.
| Favorite words: Going my way, love
| Favorite song: “Sekai ni Hitotsu Dake no Hana”
| Hello! Project Groups: Morning Musume (1998–2003)
| Subgroups: Petitmoni (1999–2002)
| Concert Units: Hello! Project Shirogumi (2005), Elder Club (2006–)
| Shuffle Units: 2000: Kiiro 5, 2001: 10nin Matsuri, 2002: Odoru 11, 2004: H.P. All Stars, 2005: Puripuri Pink

Kei Yasuda (保田 圭, Yasuda Kei, born on December 6, 1980 in Futtsu, Chiba, Japan) is a Japanese singer, muscian and actress under Up Front Agency’s Hello! Project. She was member and co-leader of J-pop group Morning Musume. Yasuda, along with Mari Yaguchi and Sayaka Ichii, were the second generation of singers to be recruited into Morning Musume. Morning Musume had only released one official single, Morning Coffee, prior to their joining.