Unzen Onsen — relief & relaxation | Compare & book inns

Overview

The history of Unzen Onsen is ancient, said to have been discovered by the Buddhist monk Gyoki in the Nara period. In the Edo period, it became the tragic stage for Christian martyrdom, but its excellent spring quality also became widely known, and it flourished as a hot spring cure destination (tōji).

Entering the Meiji era, its scenic beauty and cool climate were beloved by Westerners, and it developed as a summer resort for foreigners residing in Shanghai and Nagasaki. Golf courses and tennis courts were established, solidifying its status as an international resort. In 1934, it was designated as one of Japan's first national parks (Unzen-Amakusa National Park) and continues to attract many visitors from Japan and abroad.

Typical Spring Qualities and Benefits

The most prominent feature of Unzen Onsen is its milky-white, strongly acidic sulfur spring. With a pH of around 2, its high acidity provides strong sterilizing properties. It's also called "Bijin-no-yu" (water for beautiful skin) for its peeling effect that removes old skin cells. The scent of sulfur enhances the onsen atmosphere.

• Atopic dermatitisThe bactericidal properties of the sulfur and acidic water may help soothe skin inflammation. The water's gentle peeling effect can also help by softening and removing dry, affected skin, a key benefit for various skin conditions.
• Psoriasis vulgarisUnzen's water is known to soften the skin's keratin layer. This peeling action may help reduce the scaling and plaques characteristic of psoriasis, while the sulfur content can soothe underlying inflammation.
• Chronic eczemaThe spring's high sulfur content and acidity are believed to have a bactericidal effect. This can help manage the persistent skin irritation and inflammation associated with chronic forms of eczema.
• Impaired glucose tolerance (Diabetes)The sulfur components in the water are traditionally thought to aid metabolic function. Combined with the improved blood circulation from bathing, this may help support the body's natural ability to regulate blood sugar.
• Rheumatoid arthritisThe warmth of the water helps to relax muscles and ease joint stiffness. Furthermore, the anti-inflammatory properties associated with sulfur springs may help reduce the pain and swelling characteristic of rheumatoid arthritis.
• Dry skin

Water Characteristics and Best Season

The source temperature is extremely high, over 90°C (194°F), so most facilities add cool water to adjust the temperature. The water is milky white with a distinctive sulfur smell. Due to its strong acidity, you might feel a slight tingling on the skin, but it leaves you feeling refreshed. Precious metals can tarnish, so be sure to remove them before bathing.

Unzen is beautiful in all four seasons. You can enjoy Miyama Kirishima azaleas in spring, a cool retreat in summer, the autumn foliage of Nita Pass (designated a national natural monument), and frozen fog (Hana-boro) in winter, offering a different face with each visit.

Access

Nearby Sightseeing & Local Gourmet

• Unzen Hells (Jigoku): The symbol of the onsen town, with white steam vents and the smell of sulfur.
• Nita Pass & Unzen Ropeway: Offers stunning views of azaleas in spring, autumn leaves, and winter's frozen fog.
• Unzen Vidro Museum: A beautiful museum displaying 19th-century Bohemian glass.
• Onsen Tamago: A local specialty of eggs slow-cooked in the steam of the 'hells', with a faint sulfur aroma.
• Yu-senpei: Simple, slightly sweet crackers made using local hot spring water.
• Guzoni: A regional dish from the Shimabara area. A hearty soup with rice cakes, vegetables, fish, and more.
• Obama Chanpon: A local noodle dish from nearby Obama Onsen, featuring a light seafood broth.