The oldest known hotspring area in Japan is arima onsen. Metallic substance in the hotspring that the bath area turns brown. Great experience. Some hotels have suites for couples that has the hotspring in the room or private balcony area, costing about $500 US room/night
Arima onsen(spa) is one of the oldest onsen in Japan.
It is located in the north part of Kobe.
There are many ryokans and hotels.
You can see the traditional japanese house there.
In spring you see cherry blossoms and in autumn you see
Located just on the other side of Mount Rokko is the town of Arima, an Onsen (hot spring) resort where the smell of the hot springs drifts throughout the town. As one of Japan's oldest resort towns, Arima has many visitors year round.