Arima Onsen is a hot spring resort in Kita-ku, Kobe, Hyogo, Japan. It is considered one of the oldest hot springs in Japan, with over 1,300 years of history. It is known for its unique hot spring water, with one hot spring having iron-rich, reddish-brown water, and another hot spring having clear, blue-green water. Visitors can experience the hot springs in various ryokan (traditional Japanese inns) or public bathhouses. Arima Onsen also offers scenic views of the surrounding mountains and is a popular tourist destination, especially during autumn when the foliage is beautiful.
