Best onsen for Asthma in Oita

Amagase Onsen is one of Bungo's three great hot springs, alongside Beppu and Yufuin. The Ukihabekan Shinshiyo source is drawn via a 150-meter deep powered drill from a hillside site. With over 1,300 years of history, Amagase's waters were mentioned in the ancient "Bungo Fudoki" chronicles and have long been cherished for therapeutic bathing. This source combines pH 8.9 alkalinity with sulfur properties, gently removing old skin cells for a smooth feel. You can enjoy a silky skin sensation after bathing, perfect for those seeking to refresh mind and body.

Kamioka Onsen flows on its own, without pumps, from a 170 m well drilled in 1957 in Beppu's Kannawa district. A 2025 analysis recorded 89.5°C and pH 9.0: an unusual alkaline sulfur spring in a town known for acidic sulfur waters, its sulfur dissolved as hydrosulfide ions rather than gas. Sodium 228.0 mg/kg, bicarbonate 279.0 mg/kg, sulfate 184.0 mg/kg and metasilicic acid 339.0 mg/kg give a clear water with a faint sulfur scent and a quiet, deeply comforting character.

Myoban Onsen prospered in the Edo period through alum production and still keeps rows of thatched huts where yunohana sulfur flowers are made. Here the Okamotoya Ryokan source gushes naturally at 74.4°C in Myoban 3-kumi; colorless as it emerges, it turns a milky, bluish white once it meets the air in the bath. Its acidity gently loosens old skin cells, leaving a soft, light feeling afterward, and it suits anyone who wishes to steep in dense sulfur water amid mountain steam.

Nigoriyu bubbles up beside the Seri River in Nagayu Onsen, a village famed for carbonated springs, and was once known as the "high-temperature Ramune spring." Clear at the source, its iron content oxidizes into a tea-brown cloud in the bath, giving the spring its name. Around 40°C, the water lingers on the skin with fine bubbles and a silky, clinging feel, suiting bathers who want a long, gentle soak.