What are the dangers in Japan's wilderness?

Question:

I'm in Japan at the moment and very, very keen to go and travel to Mount Osore and further west in the Yagen Valley area. Apparently I will be very unlikely to come across any other people (Japanese or Western) travelling deep into the Yagen Valley area, so I want to go prepared with knowing what dangers there are camping out in the forests of Japan with nobody else for miles and miles (such as wild/dangerous animals, etc).

Thanks you very much for any contributions.

Answer:

It's good trecking course.
Be careful of slip down and the wether condistion. That's more likely than wild animals, like hornet and snakes.

It's the season of tyhoon and torrential rain, now.
The word "Yagen" means "V-shape". So the "Yagen Valley" should be deep and steep, and water streams would concentrated into these area when they got torrential rain. Not only where you are, but also the upstream area, from where stream would concentrated to "V-shape, Yagen Valley."

You should have someone, who knows the area and have experiences of mountain, accompany with you, if you are not very familior with Japanese mountains and climate.