Unzen Onsen, Japan

Unzen Onsen (雲仙温泉) is a hot spring resort town near the peak of Mount Unzen. Not too far from Nagasaki, the area originally developed as a temple town that in its prime was large enough to be compared to Koyasan. In the Meiji Period, the town became one of Japan’s first tourist resorts popular among foreigners, and a hint of Western influenced architecture can still be seen about town.
The resort is surrounded on several sides by hot spring fields. Also known as hells (jigoku), these barren rocky areas are littered with billowing steam vents and gushing hot springs from which milky, acidic and sulfurous water bubbles straight up out of the ground. The hells were once used to execute Christian rebels after the failed Shimabara Rebellion.A network of paved nature trails leads around the hells to several steam vents, hot spring pools, mud holes and observation points along the way. Also set along the paths is a monument dedicated to the Christian martyrs who died in the hells. Unzen Visitor Center which has displays about the disaster and its effect on daily life, local plants and wildlife found on the mountain, and an interesting exhibit on hot springs that explains the different types of springs and how they are formed.

There are also several public hot spring baths around Unzen Onsen where day trip visitors can try out the highly acidic waters. The spring quality features acidic hydrogen sulfide, sulfur-containing acidic hydrogen alum, and iron vitriol springs, and are commonly known as sulfuric springs.

Bessyo Kyodou Yokujyou

雲仙よか湯 Unzen Yokayu
380 Obamacho Unzen, Unzen, Nagasaki Prefecture 854-0621,
+81 957-73-3482
Kojigoku Onsen 

Japan, 〒854-0621 長崎県雲仙市小浜町雲仙500-1
+81 957-73-2351
Hours: 9:00 to 21:00
Closed: No closing days
Admission: 400 yen
Kojigoku Onsen is a small public bath house nestled in the forest, a 15 minute walk outside of the town center. It has two beautiful rustic stone baths and massaging waterfalls in each gender segregated area. Another small hot spring field is located behind the bath house.

Unzen Shinyu Onsen Kan

Yunosato Onsen Kyodou Yokujyou