The three mountains of Dewa (Mt. Haguro, Mt. Gassan, and Mt. Yudono) in Yamagata Prefecture respectively represent the present, past, and future.
The journey through the three mountains has come to be known as a passage through death to life, “a pilgrimage of rebirth”, since the Edo period.
Even now, Yamabushi training (called shugendo) is being carried out, and you can see a group of Yamabushi in white costumes climbing the three mountains and soliciting donations throughout the city in the fall.
This "Matsu- no-Kanjin" is one of the mountain trainings in the winter that is held for a hundred days from September 24th.
The Shoreisai festival, which is held on the final day of December 31st at the summit of Mt. Haguro, is said to have originated from containing an epidemic and various rituals are performed. Yamabushi is an entity that absorbs the spiritual power of nature through trainings and provide that power to people through prayer and performing arts.
There are Yamabushi, who gains skills of coexisting with nature through the trainings, and Noh performer who trains daily and embodies the world of the supernatural.
Why do they embody the power of nature? A talk show by the spiritual seekers living in the present will be broadcasted online from the field.

*In February 2021, an online tour will be available which introduces the video of "The Shoreisai Festival" and Buddhist vegetarian food.