Aina Otsuka

大塚愛菜 (Otsuka Aina) is a former Japanese pop singer once under Hello! Project. She is a former member of Juice=Juice and Hello Pro Kenshuusei. She was first introduced as a trainee at a fanclub event in June 2011. It was announced on July 5, 2013 that she had withdrawn from both Hello Pro Kenshuusei and Juice=Juice, subsequently leaving Hello! Project.

From April 2014 to April 2018, she was active as an independent solo idol and actress.