Shin Nanasawa is a Japanese voice actress from Tokyo, born on July 30, 1987. She is affiliated with the talent agency Sun Music Production. Her blood type is A.

Nanasawa made her television animation debut in 2009 with the role of Mutsuki Tsuyama in the series Saki. She continued to voice this character in subsequent releases, including Saki Zenkoku Hen in 2014 and the original video animation Saki Hiyori in 2015. She also provided the voice for classmate characters including Fuko Takahashi and Natsuka Sakurai in the second season of K-On! in 2010, as well as in the K-On! movie released in 2011.

Beyond animation, Nanasawa's voice acting work includes roles in video games. She reprised her role as Mutsuki Tsuyama for Saki Portable in 2010, Saki Achiga Hen episode of Side-A Portable in 2013, and Saki Zenkoku Hen in 2015.

She holds a Grade 2 certification in the Japan Kanji Aptitude Test, a first-degree certification in abacus from the Japan Chamber of Commerce and Industry, and a first-degree certification in mental calculation.