Mt Fuji has been regarded as a divide symbol by Japanese, especially for her numerous great eruptions.
As to appease the anger of the mount, Japanese built the Asama Shrine, with the main god named Asama no Oogami (which is the Mt Fuji herself), and regard Mt Fuji as the Goshintai.
The main shrine of the Asama Shrine is located at the peak of Mt Fuji, named Asama Taisya. The Asama Taisya owns the area above 8-gome of Mt.Fuji, except for the observatory and the mountain trails.
After the set up of Asama Taisya, there are lots of tales and major stories around the Mt Fuji. One of the most popular tales is En no Ozuno, commonly known as En no Gyozya,the founder of Syugendo, was being seen when he was flying around Mt Fuji at night when he was exiled to Izu Ooshima. Besides, Matudai Syonin( who has climbed up Mt Fuji for over hundred times as Sadhana in the Heian Period has built the Dainichi-temple on the peak. These episodes contribute as the base of the worship of the Mt Fuji.
Started from the Edo period, the Fuji worship has become a common practice among citizens. They share the strong faith to Fuji and built many Fuji mounts around Edo.
Fuji mound is an artificial heaped pile of earth, located in places where Mt Fuji can be seen clearly. There is a branch shrine of the Asama Taisya on each peak of Fuji mound. Those who are unable to climb and worship Mt Fuji could use these mounds to have a spurious experience of worshiping the holy mountain.
Based on the raising of the Fuji faith, countless new religions mixing up Buddhism and Shinto with Mt Fuji as the foundation had born in the Edo period. The propagation of these religions had gone too far that the Edo government could not ignore their existences. However, many of them still manage to survive the suppression from the government and continue to exist nowadays.
In the modern period, Mt Fuji is still the cradle of new religions. The set up of headquarters of Aum Shinrikyo(now known as Aleph) and Ho No Hana Sanpogyo in the piedmont of Mt Fuji should still be fresh in our memories.