Car settings for suitable tracks that I suggest below are only my propositions since these settings depend on particular vehicle and even on your driving style.
Tracks with "B" letters in their names (i.e. Punta Brava B) are de facto inverted versions of other stages.
Japanese surface is a combination of damp/wet, smooth and rough tarmac, so I would suggest using a stiff and low suspension. Also, shift the brake bias toward the front of the vehicle rather, use intermediate gearing and set the strength of the downforce on low. There are almost no cuts on Japanese tracks.
Some hairpins on Komoro.
Spacious turnings on Lake Ono track - you can turn into these corners at full speed by strongly twisting the steering wheel.
Maebashi track: drive at top speed through the village and quickly brake right behind it, in order to take a sharp corner to the right.
Twisty, low-speed section about half way of Maebashi stage.
Drive through the tunnels on Numata without hitting the walls, use good technique.
Numata B: long straights with gentle bends - you will need a long top gear for them.
On Komoro track there is quite a lot of hairpins, watch out also for jump near the finish line.
Lake Ono consists mainly of spacious turnings, though you can take them on full speed by strongly twisting the steering wheel and straighten it out in the moment when you're coming out. Watch out for a jump near the bridge on this track - after a bad take-off you may land on the road margin or score a high impact.
During the race on Maebashi maintain full concentration while driving at full speed through the village situated at the seaside: there is some rough tarmac and just behind the village there is a sharp hairpin to the right - you must brake as quick as a flash when you reach it. About half of Maebashi there is exceptionally twisty section you must drive through very carefully, without unnecessary sliding and as close as possible to inner edges. On this track watch out for a narrow bridge when entering the village near the finish line.
There are some twisty tunnels on Numata - flash through them technically and without hitting the walls. You'll deal also with long straights with gentle bends on this track, so a long top gear may be useful too. And these gentle bends you should take bravely, at top speed and as close to the kerbs as you can. Maintain a special concentration while driving at full speed through the villages.