Shinto, the ancient folk religion of Japan, developed a diverse array of schools and sects, particularly after the introduction of Buddhism in the sixth century. This era saw significant syncretism, known as Shinbutsu shūgō, leading to doctrines like Bukka Shintō, which blended Buddhist and Shinto elements, and Juka Shintō, integrating Confucian philosophies. Many traditions were also tied to specific clans or major shrines, such as Ise Shintō, transmitted by the Watarai clan at the Grand Shrine of Ise, and Inbe Shintō, linked to the Inbe clan. Influential figures like Yoshida Kanetomo founded schools such as Jūhachi Shintō, while Yamazaki Ansai developed Suika Shintō. This rich historical evolution showcases Shinto's dynamic adaptation of indigenous beliefs with various external influences.