The spring is a natural habitat for the Baika-mo, an aquatic plant that is a biological indicator of exceptionally clean water.
The water temperature at the source remains constant throughout the seasons, rarely fluctuating despite external weather changes.
The spring flows directly into the Jizo River, which is a protected waterway in Shiga Prefecture.
Samegai village, where the spring is located, was the 61st post station on the historic Nakasendo route connecting Kyoto and Edo.
The spring water is traditionally associated with local legends regarding the healing properties of pure mountain water.
Isame-no-Shimizu is a historic natural spring located in the Samegai district of Maibara, Shiga, renowned for its crystal-clear, cold spring water that maintains a constant temperature year-round. It is one of the primary sources of the Jizo River, which flows through the village. The spring is culturally significant as a designated site for preservation within the Samegai village area, which historically served as a post station on the Nakasendo trail. The water is famous for supporting the growth of the rare Baika-mo (Ranunculus nipponicus), a white-flowering aquatic plant that blooms in cool, clean running water during the warmer months. Visitors can view the spring in a traditional Japanese village setting where water channels run alongside preserved wooden residences. The site remains a protected local landmark, celebrated for its high water purity and historical role in village life.
The wooden bridge overlooking the clearest sections of the spring water where the Baika-mo plants are visible.
Bring a small water bottle to collect fresh spring water from the designated spouts.
Follow the walking paths along the canal to see the best concentrations of Baika-mo.
Wear comfortable, slip-resistant walking shoes as the stone pathways near the water can be damp.
Do not attempt to wash personal items or dishes in the residential water channels as this contaminates the local supply.
Maintain silence as this is a residential area; do not step into the water or the private residential gardens.
