Seki Daimyōjinsha, Shinto shrine in Japan

Seki Daimyōjinsha is a small Shinto shrine in Shimamoto built with traditional wooden structures that appear aged yet well-maintained. The grounds are surrounded by trees and feature small stone lanterns and simple statues lining the path to the main building.

The shrine's founding date is unknown. One tradition says it was moved here from the village of Minase after a flood; another traces it to a dōsōjin stone set up to block evil spirits from entering Kyoto. It is also said to have begun when the mikoshi of Daichimyōjin from Mount Ōyama in Hōki Province was housed here. The site is identified with the Yamazaki Barrier, and the shrine served as guardian of the barrier or the later Sekido-in. Its main hall dates from the mid-Muromachi period and was designated an Osaka Prefectural Tangible Cultural Property on 1 December 1947.

The name comes from the sekisho (barrier station) once set here on the road between Kyoto and Settsu, and the shrine is said to stand on the site of the Yamazaki barrier, later guarding the Sekido-in. A stone marker reading "From here east, Yamashiro Province" stands beside it, and the stream in front once marked the Settsu-Yamashiro border.

The shrine stands at 1-5-10 Yamazaki, Shimamoto, about two minutes on foot from JR Yamazaki Station on the Kyoto Line, or five minutes from Hankyu Oyamazaki Station. The small stream in front of the shrine once marked the border between Settsu and Yamashiro provinces; the prefectural boundary still runs roughly along it, and a stone marker reading "From here east, Yamashiro Province" stands nearby.

The shrine is said to stand on the site of the old Yamazaki Barrier, and the stream once flowing in front of it marked the border between Settsu and Yamashiro provinces; the prefectural boundary still follows the same course. Across the road to the north stood the residence of the poet Yamazaki Sōkan, and a well called Sōkan-i is remembered there.