Do I have to worry about altitude sickness when climbing Mt. Fuji?
If you are not an experienced hiker nor have trained properly, there is a real possibility of altitude sickness, including headaches, dizziness, nausea, and even vomiting. The best way to avoid this is to pace yourself, take lots of breaks, and to acclimate yourself to the higher elevations. Perhaps you can even sleep for a while, say, at the 5th, 7th, or 8th Stations, giving your body a chance to adjust to the thinner air. While some mountain huts have oxygen bottles, if you suffer a severe case of altitude sickness with vomiting, it is probably best to get down off the mountain ASAP. An excellent report on the causes and prevention of altitude sickness can be found here.
