Yunomine Onsen is a legendary hot spring village in Wakayama Prefecture, renowned as one of the oldest in Japan with a history dating back 1,800 years. It was once an essential purification site for pilgrims traveling along the sacred Kumano Kodo trails before visiting the grand Kumano shrines.

The most iconic feature is Tsuboyu, a small wooden bath designated as a UNESCO World Heritage Site, where only two people can bathe at a time. What makes it extraordinary is that the water mysteriously changes color up to seven times a day, ranging from clear blue to milky white or deep green. The mineral-rich waters are believed to have therapeutic properties that soothe the body and spirit. Nearby, visitors can enjoy boiling eggs and vegetables in a 90°C hot spring, a local tradition that adds to the charm. With its blend of cultural heritage, spirituality, and wellness, Yunomine Onsen offers an authentic Japanese healing experience.

• From JR Shingu Station, take a bus bound for Hongu Taisha and get off at the Yunomine Onsen stop (about 70 minutes).
• The area is also accessible by car via local roads through the Kumano Kodo pilgrimage region.

• Visit early in the morning or evening for a more private onsen experience.

• Tsuboyu requires advance booking at the tourist office due to its small size.

• Don’t miss boiling onsen eggs, a popular local specialty.

• Combine your trip with visits to Hongu Taisha and other Kumano shrines nearby.

Admission Fee:

• Tsuboyu Onsen: Approx. 770 JPY per person (30 minutes per session).
• Public baths in Yunomine: Around 250–400 JPY.
  • Adults: 780 JPY
  • Child: 470 JPY

Opening Time:

• Tsuboyu: 6:00 AM – 9:30 PM (last entry 9:00 PM)
• Public baths: Hours vary slightly by facility