Ginzan Onsen
In Yamagata Prefecture, deep in the mountains of Obanazawa district, lies Ginzan Onsen (silver mine hot spring) Town; quite possibly the most picturesque onsen town in Japan. A small town with two “streets” with connecting little bridges between, so essentially one street; it has become famous for its charming winter appearance when it’s traditional buildings become covered in snow.
Though remote, due to its popularity, the town is quite easily accessible, even in winter for day trips. From Tokyo it’s a rather long day trip - with Shinkansen travel and then a local bus so many people drive instead, or make their base Yamagata City for a night or two.
If you have the time, I would plan your trip to be more relaxing, at least stay one night to just leisurely enjoy Ginzan Onsen, especially if you want to see the night views. Also because in the town itself there’s not so much to do, except walk up and down the street and walk to Shirogane Waterfalls at the back of the town.
Many people will stay at least one night (which is why it also gets booked out so quickly) so they can relax in their ryokan, then pop in and out to see the pretty town at their leisure.
There are 12 onsen ryokans available to stay at in Ginzan Onsen and you can find a list of them here. In my research I decided to stay at Takimikan, at the top of Ginzan Onsen Town with views of Shirogane Waterfalls and it was utterly delightful to relax there for a couple of nights. You can read more about my stay here, and why I decided to choose this property.