Mount Hakurei is a mountain that used to be home of a holy monk. A barrier had protected the mountain until Naraku had attempted to use it as his body. It had been destroyed by InuYasha and his friends along with the help of Naraku. By some spiritual powers the mountain had been rebuilt but there is still a barrier around it. Only those with a pure heart and human blood can cross the barrier without harm. If a demon tried to get past it then the mountain would purify the demon and the demon would turn into a human.
