After the retirement, Hara started coaching career at Urawa Reds in 1992. He served as an assistant coach until 1997. In 1998, he was promoted to a manager. However he was sacked for poor performance in summer 1999. In 2002, he signed with FC Tokyo. He led the club to win the 2004 J.League Cup which was first major title in the club history. He resigned end of 2005 season. In 2007, he managed FC Tokyo in one season again. In February 2009, He was appointed by Japan Football Association as its new technical director. After 2010 World Cup, he managed Japan national team as caretaker in 2 matches until Alberto Zaccheroni became a new manager.