Hina Otsuka (大塚ひな), born September 14, 1981, in Fukuoka Prefecture, Japan, is a retired Japanese adult video (AV) actress renowned for her petite stature of 145 cm and measurements of 80-57-80 cm (D-cup). With blood type B, she debuted on November 10, 2005, in 'Kyokko Joshi Gakuen' under Aurora Project, captivating audiences with her cute face, bright personality, and loli-style roles. Managed by BK Promotion, Otsuka evolved from innocent lolita to gal aesthetics, often merging both in her versatile performances. She frequently collaborated with close friend Ruri Hosho in numerous titles across studios like Moodyz, SOD Create, and KUKI, excelling in schoolgirl, lesbian, and group genres as a popular kikatans (single-actress) performer.
In April 2009, she publicly corrected her birth year from 1987 to 1981. Announcing retirement via blog in December 2008, she briefly returned in 2010 with 'Otsuka Hina Fukkatsu-sai!!' Her hobbies include reading and karaoke, leaving a lasting legacy in JAV.