Guida
Erihara no Mizuana is a natural spring located in Shima City, Mie Prefecture. Also known as 'Ama no Iwato' (The Heavenly Cave), it is officially designated as one of the 'Top 100 Water Sources' by the Ministry of the Environment. The site is situated within a karst topography formed by limestone, where pure water continuously wells up from beneath the protection of the surrounding primeval forest. Historically, it served as a significant place of worship for pilgrims traveling the routes between Ise and Shima.
Since before the early Showa era, travelers on pilgrimages to Ise Grand Shrine have revered this site as 'Ama no Iwato' or 'Chisho-san.' Although the area suffered a landslide around 1935, the subsequent recovery led to a renewed flow of water, and a sacred altar known as the Takisaikuda has since been established. Notably, Kokichi Mikimoto, the father of the modern pearl industry, was a devotee of this site and is recorded to have participated in the local reforestation efforts.
In recent years, the site has seen an increase in younger visitors due to its connection to the cultural background of a famous Makoto Shinkai anime film. The presence of banners at Sarume Shrine and the connection to the deity (Mizu-no-kami) associated with the film's characters have made it a popular 'anime pilgrimage' destination.
The greatest attraction is the crystal-clear water that flows endlessly from the limestone cave. This water serves as a vital resource for the Koji Dam water supply, supporting the local community. A truly special moment occurs around November 23rd, when the sun's rays illuminate the interior of the cave during a sacred ritual performed by Shinto priests. The landscape offers a mystical view created by the unique natural topography.
The month of November is particularly noteworthy. During this period, you can witness the sacred ritual where the sun shines into the cave, offering a glimpse of a mystical light-filled spectacle and historical ceremony. Additionally, visiting when the surrounding primeval forests are lush allows you to enjoy the refreshing sensation of the water alongside the vibrant natural scenery.
Visitors can experience the geological wonders of karst topography and the natural mechanism of the spring. It is a place to feel the atmosphere of ancient spiritual-faith while enjoying the tranquility of nature. You can also enjoy a cultural stroll that feels like tracing the background of an animated masterpiece.
The surrounding area features several culturally significant sites, such as the groves of Izawa-no-miya Shrine (an annex of Ise Grand Shrine), Saruta Hiko Shrine, and Sarume Shrine. These locations expand your cultural exploration, as they are closely linked to the legends of Ama no Iwato and the anime-inspired scenery.
As this is a natural site, comfortable walking shoes are highly recommended. Because the terrain is part of a karst landscape, you may encounter uneven surfaces. It is advisable to carry cash for local transportation or emergencies. Please respect the site as a sacred place by maintaining a quiet and respectful demeanor. Since English signage and staff assistance are limited, we recommend checking maps or information in advance.