Ōmi-dō (大御堂), officially Gokoku-ji Betsuin Tsukuba-zan Chisoku-in Chūzen-ji Ōmi-dō, is a Shingon-shu Buzan-ha Buddhist temple in Tsukuba, Ibaraki Prefecture. Its principal image is Juichimen Kannon Bosatsu, and it serves as the 25th stop on the Bandō Sanjūsankasho pilgrimage route. The temple is a branch of Gokoku-ji in Tokyo and is known locally as an important Kannon worship site. Its religious role is tied to pilgrimage practice and the veneration of Kannon, one of the most widely revered figures in Japanese Buddhism. Visitors encounter a functioning temple complex centered on the main worship hall, with the atmosphere of an active pilgrimage temple rather than a tourist site. It has no UNESCO listing, but its place on the Bandō Sanjūsankasho gives it clear cultural significance.