The Mount Fuji climbing season is usually from July 1st to the beginning of September. Mt.Fuji is a popular and well-known tourist destination in Japan so many local Japanese and foreigners go climbing during summer. One of the best things about climbing Mt.Fuji is that you can visit there from Tokyo, hike the mountain and go back to the city as a one-day trip. Please note that there is no age restriction in general so young children can also climb. However, many tour companies allow your children to be at least 6 years old. If your children is younger but you still want to climb, then our babysitter can help take care of your children somewhere in or around Tokyo.