Emerald green hot springs. Their mystical colors are breathtakingly beautiful. Green hot springs are rare in Japan, and their rarity and beauty create a special allure.

What Are Green Hot Springs?

Green hot springs refer to those that appear green due to sulfur, iron, and fine algae.

There are various shades of green, such as emerald green, deep green, and yellow-green. The appearance of the color can change depending on the angle of light.

Why Do They Turn Green?

There are mainly three reasons why green hot springs are formed.

Sulfuric Chemical Reactions: Sulfur reacts with other components to sometimes create green compounds.

Iron and Microorganisms: When microorganisms or algae proliferate in iron-rich hot springs, they can appear green.

Effect of Light: The components of the hot spring and the effect of light can make it appear green. The depth of the water and the angle of sunlight can change the color.

In all cases, it is the result of complex chemical reactions and natural phenomena.

Types of Green Hot Springs

Green hot springs are mainly found in sulfur springs and acidic springs.

Sulfur Springs: Chemical reactions involving sulfur can result in a green color.

Acidic Springs: Strong acidity can alter the hot spring components, making them appear green.

Iron Springs: The interaction between iron and microorganisms can result in a green color.

Notable Green Hot Springs

Zao Onsen (Yamagata Prefecture): Known for the emerald green "Okama." Although a crater lake, it appears green due to hot spring components.

Shinyu Onsen (Iwate Prefecture): The sulfur springs exhibit a green hue.

Tokachidake Onsen (Hokkaido): Located at an altitude of 1,280 meters, it is characterized by a greenish color.

Due to their rarity, finding a green hot spring offers a unique experience.

The Allure of Green Hot Springs

The greatest allure of green hot springs is their mystical beauty.

The emerald green water shines like a jewel. The colors created by nature cannot be artificially replicated.

Additionally, their rarity adds to their charm. They exist only in limited locations in Japan, offering a special sense of having bathed in a rare hot spring.

Precautions When Bathing

Green hot springs often have unique components.

Potential for Strong Irritation: In the case of sulfur or acidic springs, the irritation can be strong. People with sensitive skin should be cautious.

Keep Bathing Time Short: 10 to 15 minutes is appropriate. Avoid prolonged bathing.

Rinse with Fresh Water After Bathing: To ensure strong components do not remain on the skin, rinse with fresh water.

Green Hot Springs and Photography

Green hot springs are photogenic.

Many beautiful hot spring photos seen on social media feature green hot springs. The emerald green hue looks stunning in any photo.

However, when taking photos while bathing, follow the facility's rules. It's also important to respect the privacy of other bathers.

Seasonal Changes in Green Hot Springs

The color of green hot springs can change with the seasons.

Factors such as the angle of light, water temperature, and microorganism activity can affect the color. Some hot springs offer different hues in spring, summer, autumn, and winter.

Even the same hot spring can show different expressions depending on when you visit. This is another charm of green hot springs.

Conclusion

Green hot springs are rare even in Japan. The emerald green glow is mystical and beautiful.

They turn green due to complex factors such as sulfur, iron, microorganisms, and the effect of light. The colors created by nature cannot be artificially replicated.

Their rarity and beauty create a special allure. If you find a green hot spring, be sure to experience it. It will become an unforgettable memory.