Discover the Ancient Secret of Beppu: Yunohana from Myoban Onsen


In the heart of Beppu Onsen lies one of Japan’s most unique and historic hot spring areas—Myoban Onsen.

Unlike typical hot springs, Myoban Onsen is known for producing something rare and precious: Yunohana, natural mineral crystals formed through geothermal steam.


A Tradition Preserved for Centuries

For over 300 years, artisans in Myoban have used a traditional method inside straw-roofed huts called Yunohana-goya. By combining volcanic steam with natural clay, mineral crystals slowly form over time—creating one of the most unique natural bath ingredients in the world.

This technique is so rare that it has been designated as an Important Intangible Folk Cultural Property of Japan.



From Yunohana to Soap: A Daily Onsen Experience

Traditionally, Yunohana has been used as a natural bath ingredient, valued for its cleansing and skin-smoothing properties.

Beppu Yunohana Soap brings this tradition into your everyday life.

By blending these rare hot spring minerals into a gentle soap, it allows you to experience the essence of onsen culture—not only while bathing, but also through your daily skincare routine.

The soft lather cleanses the skin while leaving it feeling smooth, refreshed, and naturally balanced—just like stepping out of a hot spring.


Why This Soap Is Special
What makes this soap unique is not only its ingredients, but also its story.

• Made with authentic Yunohana from Myoban Onsen
• Rooted in a 300-year-old traditional technique
• Inspired by Japan’s deep connection between nature and wellness

It transforms a simple moment—washing your hands or face—into a mindful ritual inspired by Beppu.



A Small Ritual, A Deep Connection

In Japan, wellness is often found in small, daily habits.

A warm bath, a quiet moment, a simple cleansing routine.

With Beppu Yunohana Soap, you are not just using soap—you are experiencing a piece of Japan’s living tradition, shaped by nature and preserved through generations.

Experience Authentic Onsen Culture at Home

At Onsen Box, we curate products that carry the true spirit of Japan.

This Yunohana soap offers a simple yet powerful way to bring the warmth, purity, and heritage of Beppu into your everyday life.

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