Did it yesterday.. left my balls off but did it.
On the first right corner you must shift to 3rd gear and then go to an inner edge in 2nd, without loosing the torque.
Exit in full speed and overtake green Mazda from the outside before the corner - you must block the inner side of the corner because Mazda will try to overtake you from the inner side. While in the corner, line yourself to overtake the Micra ASAP after exiting, to reach the left-right straight in full speed. This part is crucial because you must catch the first car in the last corner on T1 under 2 seconds.
Take the outer line for the last corner, shift to 3rd and to 2nd just before catching the inner side, and then accelerate in full speed to catch first car's slipstream. Drive straight in 4th speed, aad take the last turn in 4th then shift in 3rd just before the apex to maintain the torque. Use the strips to oversteer and lline yourself for overtaking form the inner side. Overtake the car and take the gold.
It just looks impossible, but it's very duable. You just have to leran what you can do, exactlly like in F355 Challenge game, and for the help look tutorial video for every licence.
Same procedure is with damned Celica on Fuji and Xanavi on Fuji. Didn't manage to gold others yet.