The 2018 6 Hours of Fuji was an endurance sports car racing event held at the Fuji Speedway in Oyama, Japan on the 12–14 October 2018. Fuji served as the fourth round of the 2018-19 FIA World Endurance Championship, and was the seventh running of the event as part of the championship. The race was won by the #7 Toyota TS050 Hybrid.

Fuji Speedway is a motorsport race track standing in the foothills of Mount Fuji, in Oyama, Suntō District, Shizuoka Prefecture, Japan. It was built in the early 1960s. In the 1980s, Fuji Speedway was used for the FIA World Sportscar Championship and national racing. Originally managed by Mitsubishi Estate Co., Fuji Speedway was acquired by Toyota Motor Corporation in 2000. The circuit hosted the Formula One Japanese Grand Prix in 2007 after an absence of nearly 30 years, replacing the Suzuka Circuit owned by Honda. After Fuji Speedway hosted the 2008 race, the Japanese Grand Prix returned to Suzuka for races from 2009 onward. The Super GT Fuji 500 km race is held at the racetrack on Golden Week.