Ohashi was born in Iga on October 27, 1959. After graduating from Osaka University of Health and Sport Sciences, he became coach for youth team at Japan Football Association. In 2004, he became manager for Singaporean new club, Albirex Niigata Singapore. November 2004, he became manager for Japan women's national team. He managed for 2008 Summer Olympics qualification and Japan qualified for 2008 Summer Olympics. He also managed for 2007 World Cup.