Keiko Kitagawa is a Japanese actress and former model. During the time from late 2003 to mid-2006 as an exclusive model for the Japanese Seventeen magazine, she was also known as Sailor Mars in the Sailor Moon live action show Pretty Guardian Sailor Moon (2003 - 2004). After her role in the film Mamiya Kyōdai, she left the magazine to focus on acting. She received the 55th The Television Drama Academy Awards: Special Award in 2008.
Although dreaming to be a doctor as a child, she was scouted by a talent agency and then decided to try the entertainment world. This decision met the disapproval from her parents due to her studies. After that, she proved her choice by win Miss Seventeen 2003 and gain a modeling contract with the Japanese Seventeen magazine until 2006.
She has a younger brother.