Onishi's career was primarily focused on gravure photo books and DVDs, where she was marketed for her youthful appearance. Her active period spanned approximately 2006 to 2007. Major Works : Her most notable releases include video DVDs titled Oonishi Anna 11-sai (2006) and Anna 12-sai
: Idols often train multiple times a week in singing and dancing to prepare for live performances in small theaters.
: She is well-known for solo DVDs filmed when she was 11 and 12 years old, titled "Oonishi Anna 11-sai" (2006) and "Anna 12-sai" Acting Roles : Her credits include the film A Half Blood Vampire (2007), as well as appearances in Secret Mission Vol. 3 (2011) and School Mizugi Audition PART 13