Guida
The Old Omine Water Source Water Facility is a historically significant water facility designated as an Important Cultural Property, located in the Uda-cho and Sakuragi-cho areas of Mutsu City, Aomori Prefecture. Completed in October 1909 (Meiji 42), this dam served as a core component of the water supply system for the former Imperial Japanese Navy's Omine Naval Port. Despite its relatively modest scale—7.9 meters in height and 26.5 meters in length—it holds immense technical value as Japan's first attempt at a thick-arch stone dam. It was constructed to control the flow of the Udagawa River, which originates from Mount Kamaura.
This facility is a physical testament to the introduction of modern hydraulic engineering during the Meiji era. Since its completion in 1909, it functioned as vital infrastructure for the Omine Naval Port, and was subsequently managed by Omine Town from 1946 to 1976. The structure serves as a tangible record of the region's modernization process and its historical role as a military stronghold. Today, it is protected as an Important Cultural Property in recognition of its profound historical and technical significance.
The most striking feature is the four overflow outlets built into the stone structure. These outlets are shaped into beautiful comb-like arches, creating a magnificent visual effect as water cascades down, blending structural strength with aesthetic elegance. As an early example of a thick-arch stone dam in Japan, the technical beauty of its construction is a primary attraction for visitors.
As an outdoor dam, the scenery changes with the seasons. During the summer or after rainfall, you can observe water flowing vigorously through the four comb-shaped arches. In winter, the structure may be covered in snow, offering a stark, beautiful contrast against the white landscape of Aomori. Visiting during bright daylight hours is recommended to clearly appreciate the texture of the stones and the intricate details of the arches.
Visitors can visually explore the advanced civil engineering techniques of the modern era. You can observe how Meiji-era technology utilized stone masonry to control natural river flows, feeling the weight of history through the way the stones are stacked to form the stable, elegant arches.
The facility is situated near Uda-cho and Sakuragi-cho in Mutsu City. The surrounding area is rich in nature, offering views of the pristine landscape near the source of the Udagawa River flowing from Mount Kamaura. It is a perfect stop for those exploring the historical ruins and cultural heritage of the Mutsu region.
This is a public space and a cultural property; there are no admission fees or payments required to visit the area.
English-language signage and staff assistance are limited. Please rely on visual observation and basic navigation.
No prior reservation is required to visit.
As you will be walking near an outdoor dam with natural terrain, we highly recommend wearing comfortable, sturdy walking shoes suitable for uneven surfaces.
There are no specific restrictions on photography, but please be mindful of the natural environment and ensure your safety while taking photos.
The area around the dam consists of natural terrain and may include uneven ground, steps, or unpaved paths.
As this is a designated Important Cultural Property, please do not touch the stone structures or any equipment, and avoid any actions that could cause damage to the site.