Ise Jingu Inner Shrine (Naiku), officially known as Kodai Jingu, is in the center of the precepts of the Ise Grand Shrine, in Mie prefecture. It is sacred to Amaterasu Omikami, the main guardian god of Japan. The god holds the Yatano Mirror, which is one of three sacred national treasures.
While Ise Grand Shrine is the headquarters of the Association of Shinto Shrines, it is handled separately and isn't graded. Kodai Jingu is more commonly known as Naiku, and Toyouke-dai Jingu as Geku. Geku is sacred to Toyouke-no-omikami. In a different way, Tokyo's Meiji Jingu Shrine includes a separate shrine, a sub shrine, a small shrine and a management shrine.
The broad approach to the Naiku is paved with large ballast stones, and lined with cedar trees that are hundreds of years old. The garden is about 93 square meters and it is at the foot of Mt. Kamiji and on the right bank of the Isuzu River.
The shrine was founded some 2000 years ago and today remains a sanctuary and a place of worship for Amaterasu Omikami.