A Shinto shrine is a structure whose main purpose is to house ("enshrine") one or more kami, the deities of the Shinto religion.
Two women praying in front of a shrine
Mount Nantai, worshiped at Futarasan Shrine, has the shape of the phallic stone rods found in pre-agricultural Jōmon sites.
An example of jingū-ji: Tsurugaoka Hachiman-gū-ji in an old drawing. In the foreground the shrine-temple's Buddhist structures (not extant), among them a pagoda, a belltower and a niōmon. The shrine (extant) is above.
Mount Fuji is Japan's most famous shintai.
Kami are the deities, divinities, spirits, mythological, spiritual, or natural phenomena that are venerated in the Shinto religion. They can be elements of the landscape, forces of nature, beings and the qualities that these beings express, and/or the spirits of venerated dead people. Many kami are considered the ancient ancestors of entire clans. Traditionally, great leaders like the Emperor could be or became kami.
Amaterasu, one of the central kami in the Shinto faith
Itsukushima Shinto Shrine, Miyajima Island, Hiroshima Prefecture, Japan. This shrine is believed to be where the kami dwell, and hosts many ceremonies and festivals.