After the pilgrim purifies himself, with a wish in mind, he throws water over the statue of the worshiped god. This tradition is often related to the Jizō and Fudō-myōō deities, as in this photo, taken at Ryusen-ji, a temple in Meguro, Tokyo.
EXIF info:
Nikon Df
Lens: 24-70mm F/2.8G
Focal Length: 26mm
Aperture: F/5.6
Shutter Speed: 1/60s
ISO Sensitivity: ISO 1600