Iide-san-jinja, Shinto shrine in Japan

Iide-san-jinja is a Shinto shrine sitting at the top of Mount Iide, a high peak in the north of Fukushima Prefecture near Kitakata. The shrine consists of simple wooden buildings with gently curved roofs, placed on the open summit plateau with ridgelines visible in all directions.

Mount Iide has drawn pilgrims and farmers from the surrounding lowlands for centuries, who climbed to the summit to ask for protection over their crops. The current shrine buildings reflect a long tradition of mountain worship that has remained central to religious life in this part of Japan.

The name Iide comes from a description of the mountain range as resembling rice piled high, not from a word for 'rice mountain'. The shrine's founding is credited to the monk Chidō and the ascetic En no Ozunu in 652, who named the peak and enshrined five princes (ōji) as deities. Pilgrims once carried five Kokūzō Bosatsu statues to five sites in the mountains; the place names First Prince to Fifth Prince remain, and the shrine stands at the Fourth Prince.

The summit can only be reached on foot, so visitors should plan for a full day of hiking and carry appropriate gear. The trails are most accessible in summer and early autumn, as snow and cold can make the route difficult at other times of year.

The shrine's grounds and a 7.5 km ridge trail from Mount Mikuni to near the Gosai hut belong to Fukushima Prefecture, while the summit itself was assigned to Niigata after the Meiji abolition of domains. In 1907 the Interior Ministry ruled that the pilgrimage path up to the mountain belonged to Ichinoki village, producing the irregular three-prefecture border seen today.