Why Is the Onsen Town at the Entrance to the Gorge?
Why does such a substantial hot spring town stand at the entrance to the Kurobe Gorge? Japan has spa towns in mountain valleys everywhere, but Unazuki came to be in an unusual way. No hot water ever welled up in this town. The water is piped in along the valley from a source farther up the gorge. This is not a town that grew up where the water was — it is a hot spring town the water was brought to.
Power Development Built the Spa Town
Unazuki opened up in the Taisho era, in the early twentieth century. As hydropower development on the Kurobe River pushed deeper into the gorge, the town was cleared as its gateway. Rails were laid into a valley that had turned people away, materials and workers began to move through, and a hot spring town was born by drawing water from the source upstream. That history — a mountain railway and a town of hot water growing up together in a single era — is still plainly visible in the torokko train that sets off into the gorge from just beyond the resort streets.
The water that arrives is colorless and clear, transparent enough to see the bottom of the bath. Scoop it up and it clings smooth to the palm, gentle on the skin. It has a reputation as a beautifying bath, and after a day of walking the gorge in the cold, an evening soak is the order that works best.
The Town After the Day-Trippers Have Gone
A day in Unazuki has a clear turning of the tide. When the last train down from the gorge has arrived and the day-trip crowds recede, the quiet proper to a hot spring town returns. At night the sound of the Kurobe River comes closer, and the mountain chill feels good on skin still warm from the bath. In the morning you can stroll to the steaming station front through cold air drifting down from the gorge. In these hours, Unazuki is a different town from the daytime transfer point.
Think of the torokko not as a one-way ride but as a train that carries you home to a town of hot water, and the shape of your itinerary changes. Choosing not to leave on the same day you ride into the gorge — that is the right way to use this town.