Mount Ushiro is a center of Shugendō in this region, and called Nishi-Omine, literally, West Omine. Omine is the name of the most important mountain for Shugendō in Japan. According to a local narration in this area{fact}, this mountain was developed as a training area by En no Gyōja, the founder of Shugendō in the 7th century, for Shugensha, practitioners of Shigendō. However, Dosen-ji, which is the center for the Shugendō on this mountain, was established in the 13th century, so it would be natural to understand Shugendō on this mountain also started about that time. Mount Ushiro is one of the mountains which still have some areas which women are prohibited to enter so as to not to bother the training of Shugensha.