After Formula One, Nakano went to race in Champ Car for Walker Racing and Fernandez Racing. He made 56 starts from 2000 to 2002 with a best points finish of 17th in 2002 and a best race result of 4th at the 2002 Molson Indy Toronto. He also started 15th in the 2003 Indianapolis 500 for Beck Motorsports, finishing 14th. He competed in the 2006 and 2008 24 Hours of Le Mans races and returned to the event in 2011 with OAK Racing and 2012 with the Boutsen Ginon squad.