Kurokawa Hot Spring is a quiet mountain hot spring area north of Mount Aso, near the border with Ōita Prefecture. It is one of Japan’s most popular hot spring destinations. Twenty-four small ryokan (Japanese-style inns) line the Tanohara River. The area operates under a cooperative system known as “the whole area as one inn,” where large hotels and flashy signs are prohibited. This approach has successfully preserved a peaceful, rustic atmosphere, which is a key reason for Kurokawa’s enduring popularity.
Each inn has its own hot spring source with distinct mineral properties. By purchasing a hinoki (cypress wood) pass for 1,300 yen, visitors can enjoy the baths at three participating inns.
The “Yuakari” event on winter evenings is particularly enchanting. Bamboo lanterns placed along the stream magically illuminate the onsen area.
The success of Kurokawa now serves as an excellent example for other hot spring resorts that are losing popularity. Several have begun adopting its model, particularly the popular onsen pass system.