Hi. I am glad to leave some information about the trails for Mt. Fuji climbing.
As you may know, there are four trails to the summit. The most popular Yoshida Trail, the shortest Fujinomiya Trail, and then Subashiri Trail and the longest Gotemba Trail.
At this moment, the entrance fee for Mt. Fuji is 1,000 yen but it is not compulsory and it’s your choice to pay or not. However, the fee is used as the conservation assistance fund for the mountain environment which is registered as a World Natural Heritage of UNESCO, so that if you agree with the idea, it would be much appreciated there before your climbing.
You can pay the entrance fee at the 5th Station on each trail.