How do you go to the toilet?
"Please note, however, that even though the main Yoshida Trail will be open to the summit as of July 1, all huts, restrooms, and other facilities above the 8.5 Station will be unavailable"
So does that mean above the 8.5th station, you need portable toilet bags? Do they sell any on the mountain? Do you go off the trail a little to get some privacy? Do you only need the bags for poo or urine too?