Oi Shrine is the water god of the Oi River, and there is a kami pond with clear water in its precincts, and the pure water from an old well flows into the precincts. The water temperature is almost constant all year round, so it feels cold in summer and warm in winter.
The first pond was built in the precincts of the shrine in 1915, about 100 years ago, to commemorate the 300th anniversary of the relocation of Oi Shrine to the land of Shimada, and was built around the current parking lot on the side of the shrine office by the services of the veterans at that time.
The current pond was moved to the center of the precincts in 1985 during the commemoration of the 60th anniversary of Emperor Showa's accession to the throne, and it is more magnificent in size and scenery than the previous pond.
Now it is indispensable in the precincts, and it is a beautiful water scenery of the water god.