Unzen Fukudaya is a long-established ryokan in the heart of Unzen Onsen, founded in 1968 and having welcomed over 1.1 million guests. Under the concept of Mingei Modern, the inn blends traditional folk-craft aesthetics with contemporary comfort. The water is a simple acidic sulfur-iron (II) spring of the hydrogen sulfide and ferrous sulfate type, rising at 56.1 degrees Celsius with a strongly acidic pH of 2.4. Every bath in the inn is fed by free-flowing milky-white sulfur water, and the signature experience is the Eight-Bath Circuit, a journey through eight distinctively designed baths within the property. The panoramic open-air Kunpu-no-Yu at the Sansho Annex commands sweeping views of the Unzen mountain range, while the Seseragi-no-Yu outdoor bath in the main building offers a soak amid the murmur of a mountain stream. The indoor Hakuun-no-Yu provides both a hot and a tepid pool, and the Fugen-no-Yu includes a sauna. Multiple private baths are also available. Therapeutic benefits include relief for hypertension, arteriosclerosis, chronic skin conditions, atopic dermatitis, diabetes, and cold sensitivity. Day-trip bathing is also welcome, making this a rewarding destination for experiencing Unzen's celebrated white sulfur waters to the fullest.