IRL Touge only contains minimal drifting and is mostly just like normal racing. Although Touge is the roots of the modern "sport" of drifting there is no such thing as mountain drifting races in real life despite popular misconceptions to the contrary. As 1 on 1 touge races only involve two competitors I can't see a wide appeal for this format in LFS where most people seem to be looking for more cars in their races, not less.
Many members have requested mountain tracks for LFS and if this ever occurs you can just stage your own 1 on 1 touge (or whatever you want to do) and I expect you would be quite satisfied.