In 2009, after completing her studies at Nippon Engineering College, Shiori Izawa enrolled in the third batch of students at A&G Academy's seiyuu training school. Following her graduation from the academy, she joined Kaleidoscope as a talent agency member and made her professional debut in Toaru Majutsu no Index and Jigoku Shoujo Mitsuganae shortly thereafter. After leaving Kaleidoscope in December of that same year, Izawa became a freelance actress for a brief period before joining Early Wing in April 2010 as a regular member of the agency.