Natsumi Mizushima (May 7, 1984) is a Japanese retired professional wrestler, better known by the ring name Natsuki Taiyo. Making her debut for All Japan Women's Pro-Wrestling (AJW) in January 2004, Mizushima quickly affiliated herself with Nanae Takahashi, following her out of AJW in 2006 and to Pro Wrestling Sun and NEO Japan Ladies Pro Wrestling, with the two forming the Passion Red stable with Kana in the process. After the folding of NEO, Mizushima began working exclusively for the World Wonder Ring Stardom promotion, where she became a one-time holder of both the Artist of Stardom and Goddesses of Stardom Championships. She is also a former four-time holder of the High Speed Championship, which has been owned by both NEO and Stardom. Mizushima was recognized as one of the top high-fly