Rena Nounen is a Japanese actress and fashion model from Kamikawa, Hyogo Prefecture. She is best known for her lead roles on the NHK drama series Amachan (2013).

She debuted as a fashion model in 2006 and was selected as the eleventh image character for Calpis in 2012. In 2012 she was chosen in an audition of 1953 women to play the heroine in the 2013 NHK Asadora Amachan, in which she plays a high school girl who decides to become an ama, or female shell diver, as well as an idol. Amachan was a rating success, earning an average 20.6% rating over the span of the series, second amongst Asadora only to Umechan Sensei (at 20.7%) in the last decade. Nounen served as the "PR Ambassador" for the 2013 Kohaku Uta Gassen and was a featured performer on the show, singing and leading the band.