"Thus people come to the temple to drink water from the falls by collecting it in tin cups; the water is said to have therapeutic properties, and drinking from the three different streams is said to confer health, longevity and success in studies." - Kyoto.Travel
"... by entering the hall, you are figuratively entering the womb of Daizuigu Bosatsu, a female Bodhisattva who has the power to grant any human wish. Once you get to the inner sanctum, you are meant to turn the large stone found there in a clockwise direction and make your wish. Be warned, there are several 90-degree turns to navigate in the darkness - walk slowly and keep a hand in front of you." - lonelyplanet.com