Arima Onsen

Arima Onsen is located in Kita Ward, Kobe, Hyogo Prefecture, and is one of Japan’s oldest hot spring resorts. Together with Dogo Onsen and Shirahama Onsen, it is counted among the “Three Ancient Hot Springs of Japan.” Since ancient times, Arima has been beloved by members of the imperial family, military leaders, and literary figures. It was praised as one of the finest hot springs in The Pillow Book during the Heian period and was later regarded in the Edo period as the top hot spring in western Japan.

Situated in a mountain valley on the northern foot of Mount Rokko, Arima Onsen lies along the Arima–Takatsuki Tectonic Line fault zone. From deep underground, natural hot spring waters with a variety of mineral compositions rise to the surface, creating a rare diversity of spring qualities. The area is best known for its iron- and salt-rich spring water, which turns reddish brown when exposed to air due to oxidation. This distinctive water is called Kinsen, or “gold spring.” Another type of clear, colorless spring water is known as Ginsen, or “silver spring,” and includes both radium-rich radioactive springs and bicarbonate springs. Together, Kinsen and Ginsen have become the most iconic symbols of Arima Onsen.

The hot spring town is built along the mountain slopes, with narrow, winding streets that preserve the nostalgic atmosphere of a traditional Japanese onsen village. Yumotozaka, once an important route connecting Osaka and Arima, remains the liveliest street today. Lined with historic inns, souvenir shops, sweet shops, and restaurants, it offers visitors a charming setting for a leisurely stroll through the town.

In addition to staying at traditional ryokan inns, visitors can experience Arima’s famous public bathhouses. Kin no Yu offers the reddish-brown Kinsen waters, while Gin no Yu features the clear Ginsen springs, allowing travelers to easily enjoy two very different types of hot spring water. Larger bathing complexes such as Taiko no Yu are also popular among tourists.

The area around Arima Onsen is rich in both cultural and natural attractions. These include Tosen Shrine, dedicated to the guardian deity of the hot springs; the historic Onsenji Temple and Gokurakuji Temple; and the Taiko no Yudono Museum, which introduces the connection between Toyotomi Hideyoshi and Arima Onsen. For visitors who enjoy nature, nearby scenic spots such as Zuihoji Park, Momiji Valley, and the Arima Forty-Eight Waterfalls offer beautiful landscapes, especially during the autumn foliage season.