In 2001, Ōta won the Grand Prix along with Yui Aragaki at the 4th Reader Model Audition of the magazine Nicola.
[citation needed] She has appeared in many television advertisements for products such as Shiseido, Sony and Aohata (Kewpie).
In the same year, Ōta was in charge of the April–September quarter of NHK's language programme Russia-go Kaiwa.
[citation needed] Rina Ōta was born on January 11, 1988, in Chiba Prefecture, to a Japanese father and a Russian mother.
[3] Ōta married actor Ryuhei Matsuda on 11 January 2009, the two met through a mutual friend in the fall of 2007 and soon began dating.