Giro Automobilistico d'Italia '1973–80

JSPC '1983–92

The All Japan Sports Prototype Championship, abbreviated as JSPC, formed by the Japan Automobile Federation, was a domestic championship which took place in Japan for Group C and IMSA GTP prototype cars and also featured cars that were eligible for touring car racing in its earlier years. Class A and Class B for production cars which were defined by the FIA (Group A and Group B) and the lead category, Class C would be for cars that are similar to IMSA's Camel Lights and the WEC's C2, whereas Class D was for C1/GTP cars.

SCCA World Challenge '1990–2019

Supercar Challenge '2001–pr.

Grand-Am Sports Car Challenge '2001–13

Britcar Endurance '2005–pr.

Website of the championship: britcar-endurance.com

IMSA Sports Car Challenge '2014–pr.

WheelsAge.org '2005–pr.