The path itself is an absolute orgy of "torii", red-painted wooden arches donated by compaines and individuals, over tenthousand of them in all. Along most of the path you're walking in a red, wooden tunnel, so closely are they standing to each other. And as the path winds itself up along a densely forested hillside the light is decidedly dim, even on a sunny day.
The torii stretch out all along the mountain side to form a long, red, wooden tunnel. In the center a painter is filling the donor name on a new gate.
The torii are donations from people and companies, giving thanks for successful enterprises. As the wooden toii don't really last in the humid climate (I've heard 15-20 years mentioned), there'll be "openings" for donations dotted all along the way, and old, half-rotted gates will stand next to ones so fresh the paint has yet to dry. Along the way there are many small shrines or offer mounds for all kinds of special needs; there's shrines not only for all kinds of manufacturers, but also for advertising and for PR work, and for various ailments. The shrine for back pain is memorably accessible only via a steep, narrow set of stairs sure to test the faith of everybody with spinal trouble. More pictures in my photo set