All-Japan Formula Three Championship
Cunnington began his career in 2013 in the Asian Formula Renault Series, winning the Masters Class in 2014. From 2015, he is racing in the All-Japan Formula Three Championship national class with the FSC Motorsport team founded by Antoine Malin. The team is powered by TOM'S Racing. In his first season, he finished sixth in the national class standings, with a best overall finish of 4th in Sugo.