It is said that the number of sites provided with a legend of Kobo-water, for example, "when Kobo Daishi hit the ground with his stick, a spring appeared, forming a well or pond," reaches a thousand and several hundreds.
弘法大師が杖をつくと泉が湧き井戸や池となった、といった弘法水の伝承をもつ場所は日本全国で千数百件にのぼるといわれている。