Yasuda Kei (保田圭, legal name: Kozaki Kei (小崎圭)) is a Japanese singer, musician, and actress formerly under UP-FRONT PROMOTION's Hello! Project. She was member and sub-leader of Morning Musume. Yasuda, along with Yaguchi Mari and Ichii Sayaka, were the second generation of singers to be recruited into Morning Musume. She's a part of Dream Morning Musume.