As my knowledge, I haven’t heard any of free guides of Mt. Fuji climbing. Although I searched some information about it thru several websites in both Japanese and English, unfortunately I couldn’t find any.
What I could reach is that there is an organization which provide some free tourist guides for major sightseeing spots around Mt. Fuji including the 5th Station of Yoshida Trail only walking around and introduce some alpine plants.
However, regarding the climbing guides, it seems there is no free one but fee-based guides.
Just for your information, I put here some English website of well-known travel agencies providing English tours for Mt. Fuji climbing. http://willerexpress.com/en/fuji/ http://www.japanican.com/en/tour/detail/CUL2J00101MKS/?typecd=TOU&destcd=V21&typegrpcd=TPA
I’m sorry not to offer any information which you wanted… but I hope you enjoy your climbing and have fantastic experience.