From the archive
FYG Guides - Climbing Mt. Fuji (Fujisan)
Backpack 25-35 Liters simple backpack which can stuff everything below is recommended. Hip-belt provide support and reduce stress on your shoulder. Rain Jacket, Pants & Rain gaiters [Rentals Available. 2,000yen for 2days / 3,000yen for 3 days] Remember you will climb high alpine peak in subtropical climate zone.
Discussion
Summer is the season for climbing Mt. Fuji, and it is open for climbing for only about two months a year.