Risa Niigaki (Niigaki Risa, born October 20, 1988 in Kanagawa, Japan) is the 5th generation member of the Japanese pop group Morning Musume as well as the sub-leader. She joined Morning Musume in 2001 along with Ai Takahashi, Asami Konno and Makoto Ogawa. She grew up in Yokohama after moving there at age six.
