Yes ! I did run the Fuji Race... But the Fuji Mountain Race is a very difficult race, with a lot of gravel, scorias, and WALLS of rocks where you need both feet and hands! Plus the altitude... 4h50 of efforts instead of my 4h30 goal (not very serious to arrive in Japan the day before this kind of course, assuming 7 hours jet flag!) When you arrive on the top of the moutain, I can tell you that you are happy to be there... And, after, as a reward, you need to descend back to get to the bus... A 1500m downhill in sand and dust to finish kill your legs !