Ohgo began acting in 2000 when she was seven, then she joined Sunflower (Himawari), which is a theatrical company. She debuted with the company at the Meiji-za in Story of a National Thief. In early 2005, Ohgo debuted in her first major film, Kita No Zeronen (北の零年, a.k.a. Year One in the North), directed by Isao Yukisada, with the well-known actor Ken Watanabe, where she played the role of Tae Komatsubara. In December 2005, she debuted in Hollywood with Memoirs of a Geisha, directed by Rob Mars
