Before there was a road over the mountain, travelers got past it by running between waves. The stretch was called “parent doesn’t know child, child doesn’t know parent.” Today three of Japan’s main arteries are packed into that same narrow corridor. The view down onto them from the old road above is still called the finest on the Tokaido.
For most of its history, the way past this mountain was to run.
Satta-yama drops straight into Suruga Bay. There was no dry ground at the bottom, nowhere to put a road. For centuries the road was whatever wet rock the sea left uncovered. If you had time, you waited for low tide. If you didn’t, you waited for a wave to pull back. Then you ran. Time it wrong and the sea took you. They called that stretch oyashirazu koshirazu: “parent doesn’t know child, child doesn’t know parent.” Everyone was on their own.
That same strip of shore is still the only flat ground here, and these days it is full. National Route 1, the Tokaido Main Line, and the Tomei Expressway all run through it side by side, crossing over each other in a gap barely wide enough to hold them. The pass above looks down on all of it, with Mount Fuji standing behind. That is the picture.

Hiroshige drew this around 1834, for the Fifty-three Stations of the Tokaido. It is called Satta Peak at Yui. A crag rising on the left. Two wind-bent pines. Three small figures at the top of the cliff, one of them leaning out over the drop. Sails on the water, Fuji across the bay. Most of his series is busy with porters and teahouses and weather. But this one is rock and air, and you have to look carefully to find people in it.
The scene still lines up, more or less. The sails have gone. The pines have gone. The bald hill Hiroshige drew is under fruit trees and scrub. But the shape of the land is the same, and so is the angle on Fuji.











