is a Japanese singer and pianist. She was a member of AKB48. Concurrently as a student specializing in piano at Tokyo College of Music, she has released a piano instrumental album Kokyà « Suru Piano on October 3, 2012, which reached number 10 on Oricon's albums chart.
On December 5, 2023, Matsui and comedian Kohei Ueda jointly announced through their respective social media accounts that they had registered their marriage on December 3.