With an enormous output of about 25,000㎥ a day (2013 data), this spring makes up 70% of Oga Peninsula’s famous water from the base of Mt.Kanpuzan. Snow melt and rain soak into the base of Mt. Kanpuzan, becoming purified and infused with minerals while flowing through inside of the volcano. It is thought to take about 20 years for this natural filtration process to occur before the water gushes forth into the open. Used for both agriculture and drinking water throughout Oga Peninsula, this spring is truly a blessing of the volcano. The 38-hole cylindrical water diversion used to distribute water evenly is also an impressive sight.