Shimonomii Shrine, Shinto shrine in Japan

Shimonomii Shrine stands within the grounds of Ise Jingū's Outer Shrine (Toyōke Daijingū) in Toyokawachō, Ise, on the right side of the stone steps leading up to Taga-miya and to the left of Tsuchi-miya. Its single plank fence encloses not a shrine building but a small roofed shelter (oioya) built over a well curb; unlike the larger, double-fenced Kamimii Shrine, the shelter is too small to enter. A saisen box stands here, though Ise Jingū's subordinate shrines usually have none.

The shrine's origin is unknown. Until the Meiji era, a separate imibiya-den at Taga-miya prepared six monthly offerings; when that hall was abolished, its well was kept and became Shimonomii Shrine. In 1872 the shrine was removed from Jingū administration, but the Jingū office restored it and Kamimii Shrine in 1873. Its shelter was rebuilt in March 1913.

The shrine's other name, Wakamiya, and its deity Shimonomii Mamori no Kami tie it to the outer shrine's sacred water: it guards the well from which offerings are drawn. Unlike the four other subordinate shrines of the outer shrine, it has a offering box. Few visitors come, as it sits on a path below the Taga-no-miya cliff.

The shrine stands up a slight rise in a hollow beyond Tsuchinomiya, on the right side of the stone steps leading to Taga-miya within the Gekū precinct. It is about five minutes on foot from the south exit of Ise-shi Station on the JR Sangū and Kintetsu Yamada lines, and immediately from the "Gekū-mae" bus stop. Parking for 448 cars is available nearby.

The building inside the fence is not a shrine hall but a small roofed shelter over a well frame, too small for anyone to enter; the upper shrine's shelter is larger and its fence doubled. Clay haniwa models of this enclosure type were unearthed at the Takarazuka and Gyōja-zuka kofun. A collection box stands here, though Ise's subordinate shrines usually have none.