This is one of the Shinchi Sanshimizu (Three Clear Springs).
It is believed that the name of the spring was derived from the fact that its water tasted so good that people asked for one more cup (ippai) to drink.
It is said to be the best-tasting water in Japan due to its high calcium content and lack of iron.
It is also called “longevity water” because, as legend has it, drinking this water will restore one's energy and prolong one's life.
On the opposite side is a statue of Fukuda Kikiwake (listening to reason) Enmei (life-prolonging) Jizo, erected in 1989 with contributions from local residents, which gently watches over visitors.