Not to be confused with later imitators in F1 cars. Fuji Speedway Circuit with the banking. This was Group 7 racing - essentially the Japanese CanAm. It was Toyota 7 V8 vs Nissan R382 V12 vs an early Porsche 917 Flat-12 driven by Jo Siffert/David Piper!
*Warning: To make this sound less like a Godzilla movie, turn the volume down and play some background music while viewing.
And a cool vid on the 1966 event, including a tour of the track and some great race cars at the end!