Nakabusa Onsen (中房温泉)

Nakabusa Onsen (中房温泉) is a unique mountain lodge with natural hot springs that also functions as a major trailhead base for classic Northern Japanese Alps routes—especially the approach toward Mt. Tsubakuro-dake (燕岳) and the so-called “Panorama Ginza” corridor. It’s the kind of place that works both as logistics (sleep + early start) and as recovery (serious onsen culture) in one stop.