Kuwabara was born on September 21, 1991, the youngest of three girls. Older sisters Yu and Mako are also musical, and it was Mako who introduced Ai to her current musical partner Yusuke Morita, who was her classmate at the Tokyo College of Music.Kuwabara graduated from the Music Department at Senzoku Gakuen High School as a jazz piano major in 2010. She studied piano under Yuki Arimasa, Yoko Yamashita, and Kazune Zaima. She has won many awards including gold medals at the All-Japan Yamaha Electone Contest,[4] for both the lower elementary division and the upper elementary division. She has performed at the UNICEF Charity Concert and International Junior Original Concert. She was featured in AERA magazine as a “Genius Electone Girl.” In the middle of junior high school, she switched to playing the piano.She is 5ft 7in.