
Guida
Nanki Katsuura Onsen is a beautiful hot spring destination located in the southern part of Wakayama Prefecture. Historically, the area featured different springs known as 'Iso-no-yu' and 'Akashima Onsen,' which have since evolved into the unified Nanki Katsuura Onsen known today. The development of its many hot spring sources accelerated through advanced drilling techniques during the Taisho era. The area has grown alongside the development of local infrastructure, such as the designation of the Yoshino-Kumano National Park in 1950 and the electrification of the Kisei Main Line in 1978. Today, it serves as a vital cultural and tourism hub due to its proximity to the UNESCO World Heritage site, 'Sacred Sites and Pilgrimage Routes in the Kii Mountain Range.'
The history of these hot springs is ancient. During the Taisho era, records show that the head of the Kii Tokugawa family, Yoritomo Tokugawa, visited the area. He was so captivated by the experience of bathing in a cave-style spring that he remarked he would 'forget to return home'—a sentiment that gave rise to the name of the famous 'Bokido' (the Cave of Forgetting to Return). In the 1960s, the area became a popular destination for honeymooners. In recent years, as global interest in UNESCO World Heritage sites has surged, Nanki Katsuura has solidified its role as a destination where history and nature meet.

There are many spots around Nanki Katsuura Onsen where you can feel the essence of nature and history. The most iconic is 'Bokido,' a unique hot spring facility located inside a natural cave. Beyond the hot springs, the dramatic coastline and surrounding natural environment are major attractions. Additionally, the area is famous for its vibrant food culture, particularly the tuna cutting shows and the availability of incredibly fresh seafood, offering a perfect pairing of hot spring relaxation and culinary delight.
Nanki Katsuura Onsen offers a wonderful experience throughout the year. The surrounding scenery and sea conditions change beautifully with the seasons. For instance, summer is a great time for coastal activities, while winter highlights the peak season for delicious tuna and other seasonal seafood. Visitors can enjoy the peaceful atmosphere of the hot springs at any time, including the soothing way to end a day after sightseeing or enjoying a traditional dinner at their accommodation.
Beyond soaking in the hot springs, visitors can engage in various activities utilizing the local environment. The area serves as an essential starting point for pilgrims and hikers walking the Kumano Kodo, a world-famous pilgrimage route. Given its proximity to the coast, you can also enjoy a relaxing stay while gazing at the beautiful ocean views. Your journey here can seamlessly blend hot spring relaxation with the exploration of historical heritage and natural landscapes.
Nanki Katsuura Onsen is the gateway to several significant sites related to the UNESCO World Heritage 'Sacred Sites and Pilgrimage Routes in the Kii Mountain Range.' Key destinations nearby include the Kumano Kodo pilgrimage routes, Daimon-zaka, Nachi Falls, Nachi Taisha Grand Shrine, and Seiganto-ji Temple, as well as scenic spots like Kinosaki-Matsushima and the Smoke Peninsula. These areas are characterized by breathtaking natural landscapes and historic structures, forming a perfect travel route from the hot spring base.
When visiting the hot springs, please prepare your own towel and yukata (if required by your accommodation). If you plan to walk the Kumano Kodo or explore natural areas, comfortable walking shoes and practical clothing are essential. Regarding payments, please note that some facilities may only accept cash, while others accept credit cards. While English support may be available at major tourist information centers and large facilities, it is highly recommended to check specific details or make reservations in advance for a smoother experience.