Holy water @ Kushida Jinja
霊泉 鶴の井戸（櫛田神社）
At the well of the crane in Fukuoka you can partake from the holy springs on the grounds of Kushida Shrine. The sign says that your first drink will give you perpetual youth, your second drink will give your family perpetual youth, and your third drink will give your friends perpetual youth. I don’t remember if I pertook, but if I did, it hasn’t worked.