🗺️ Tsukahara Onsen Kakono no Izumi塚原温泉 火口乃泉

Nestled at an altitude of about 800 meters on the slopes of the famous active volcano "Garan-dake," lies a hidden hot spring. Both the indoor large bath and the outdoor bath allow guests to enjoy 100% naturally flowing hot spring water. Characterized by its strongly acidic mineral content, this hot spring boasts the highest iron ion concentration in Japan, with acidity and aluminum ion levels ranking second in the country. It not only attracts general tourists but is also regarded as a medicinal bath due to its ability to treat various ailments, making it a favorite among those seeking therapeutic benefits. This hot spring, which has been bubbling up for 800 years, is a precious treasure nurtured by nature in Oita Prefecture. Additionally, it is recommended to pay a visit to the smoking volcanic crater, where the hellish landscape of the crater and the distant natural gradients of the highlands are worth seeing. After the visit, you can enjoy onsen tamago (hot spring eggs) that have been steamed for about 20 hours using the steam from the crater, infused with the mineral properties of the hot spring.

Located at an altitude of about 800 meters on the slopes of the famous active volcano "Kagoshima," this area features hot springs that emerged 800 years ago, known for their healing properties for various ailments. Visitors can also explore the smoking volcanic crater. A must-try delicacy is the onsen tamago (hot spring egg), which is steamed using the volcanic steam for about 20 hours.