Nagayu Onsen

Pastoral basin under Mount Yufu, famous for ryokan with private rotenburo, craft shops along Yunotsubo Street, and the morning mist over Lake Kinrin.

Aso-region onsen village treated as a single inn — a wooden bath-hopping pass (nyūtō tegata) opens three rotenburo of your choice across the participating ryokan.

Eight distinct onsen districts (Beppu Hatto) — Kannawa, Myoban, Kankaiji, Hamawaki, Kamegawa, Horita, Shibaseki, central Beppu — and more spring sources than any other city in Japan.