Both Streets of Willow and Horse Theif Mile are run in both directions in real life, so it makes sense to have it in the game.
D1GP hasn’t run Fuji in reverse since this monster crash back in 2009
D1 and FD comps at Fuji are now done in the forward direction.
D1 also used to do the esses at Suzuka in reverse, but they’ve ditched that course in favour of the T1 200km/h handbrake show.
Tsukuba ran a couple FD events using Dunlop corner and what is essentially the 2nd hairpin, in reverse. That layout hasn’t been used for a couple years now, with most comps going back to running the standard Tsukuba drift course.
I’ve never seen any official series run RBR in reverse. Maybe they run some of the configurations in reverse for track days, but for actual racing, the circuit would never pass safety standards in reverse. The biggest issues would be the entrance into the pit lane, which is basically a cutting knife aimed at the braking zone of the fastest straight on the circuit; and the final corner (forward T1) has almost no runoff for coming at full speed down that hill.
I think it’s a typo....but it’s PD, so who knows. True authenticity isn’t really PD’s bag, so they’ll probably just make some stuff up as they go.