The Sakamoto Clan who owned the land where Sanbuichi Spring was located, donated the land to Nagasaka Town in 2002. The area was thus developed into a park, and Sanbuichi Spring Museum was built.
The museum provides information on the mechanism of Sanbuichi Spring and its history of water conflicts. It also displays a variety of exhibits on the Yatsugatake Nanroku Springs, including their function, water quality, history, folklore and use for hydropower generation.
Adjoining the museum are a farmers’ market stocked with fresh-picked local vegetables, a soba restaurant called “Sanbuichi” serving soba noodles made using buckwheat and water from the Yatsugatake Nanroku area, and a workshop providing hands-on experience in making soba and miso (by reservation). The panoramic observation hall on the third floor offers an expansive view of the Yatsugatake Mountains and Southern Alps.