1. Kojigoku Onsen, Unzen Onsen, Nagasaki ★★ Inside the room with the bath, the steam is so thick that you can barely see the bath. The bath is divided into two parts, one is medium temperature, the other area, a smaller one, is really hot. The color is milky blue, the smell is a little sulfurous. One window is fully open, so it is quite comfortable to breathe. Small branded towels are sold for ¥200, large ones are not available for rent. The onsen is old-school, but not so old-fashioned that it feels completely dated, I liked it. 25.12.2023
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