Jingū-ji
Until the Meiji period (1868–1912), the Japanese jingū-ji (神宮寺, shrine temple) were places of worship composed of a Buddhist temple and of a shrine dedicated to a local kami. These complexes were born when a temple was erected next to a shrine to help its kami with its karmic problems. At the time, kami were thought to be also subjected to karma, and therefore in need of a salvation only Buddhism could provide. Having first appeared during the Nara period (710 - 794), jingū-ji remained common for over a millennium until, with few exceptions, they were destroyed in compliance with the Kami and Buddhas Separation Act of 1868. Seiganto-ji is a Tendai temple part of the Kumano Sanzan Shinto shrine complex, and as such can be considered one of the few shrine-temples still extant.
History
Founding
When Buddhism arrived in Japan, it encountered some resistance from pre-existing religious institutions and beliefs. One of the first efforts to reconcile pre-existing Japanese religion with Chinese Buddhism (in what would later be called shinbutsu shūgō, or amalgamation of kami and buddhas) was made in the 8th century during the Nara period with the founding of so-called jungūji or shrine-temples, religious complexes consisting of a shrine and a temple.