Fuji Speedway pairs a 1.5-kilometer straight with a technical final sector — and weather off the mountain that has cut more than one WEC race short.
What it is
- 4.563 km, 16 corners, at the foot of Mount Fuji
- Main straight of roughly 1.475 km — one of the longest in circuit racing
- Fog and heavy rain roll in from the mountain within minutes
- Two WEC races here were stopped before the scheduled distance
What it demands
The setup question at Fuji is unusually blunt: wing angle for the straight, or wing angle for the last sector. Cars trimmed for top speed gain time in one place and give it back in three, and the fastest lap is rarely set by the car with the highest terminal speed.
Weather turns that compromise into a gamble. Fog closes the circuit entirely when visibility drops below the safety threshold, and a race can sit behind the safety car for hours or stop altogether. Our race pages flag every shortened event, because distance and average speed mean nothing without that context.
In dry conditions the long straight makes Fuji one of the easier tracks for lapping traffic — prototypes clear GT cars in a single move rather than fighting through a technical section.