The world of Naruto is a fascinating and multifaceted one in which incredible jutsu and powerful Tailed Beasts exist, along with an expansive list of strange or even alien entities making for some compelling mysteries. One element introduced in Part 2 of the series, or Naruto Shippuden for anime fans, is a strange organization that Hidan from the Akatsuki represents. The Cult of Jashin is one of the more subtle loose ends in the series, creating one of the more interesting mysteries of the Naruto world, but for fans who have explored more of the series lore, this case might be closed.

https://screenrant.com/naruto-biggest-mysteries-jashin-solved-konoha-story/