Haruna was born on the islands of Gotoo in Nagasaki, Japan. Haruna has two older sisters. Her father died when she was nineteen years old. She auditioned in a modelling contest and won the Grand Prix first prize in 2007. She debuted as a model in the same year. She was on television debuting on a children's variety program called Fitenshen TV in 2008. She also debuted as a singer on the same program. She began her career on the small screen and with modelling work before graduating to the big screen. She was chosen to do an advertisement for a home builder's television campaign in 2009. Like many celebrities, Haruna endorses a number of corporate products. She started a blog in 2009 followed by her official website. She was the main character of a television serial called Hatsukoi Chronicle in 2010. She graduated from teenage modelling in 2011 and said she would focus on her acting career. She released a photo book in 2012. NHK decided to reshoot scenes from the Kirin Ga Kuru drama in which actress Sawajiri Erika had appeared replacing her with twenty-four-year-old actress Haruna Kawaguchi. Sawajiri had been arrested for drug possession. She is signed with Ken-on agency.
