Brand story
To those who cherish themselves from root to tip—ONSENSOU brings expert hair care straight from Beppu, Japan’s most renowned hot spring region.
The brand name ONSENSOU comes from "hot spring algae," a beauty-enhancing ingredient extracted from algae found in Beppu’s natural hot springs.
This unique extract helps maintain a healthy scalp environment, offering gentle care for those with scalp concerns. Inspired by Beppu and its onsen heritage, ONSENSOU features a minimalist design that reflects the Japanese aesthetic of wabi-sabi, embodying simplicity, tranquility, and natural beauty.
Development concept
ONSENSOU was born in Beppu, Japan—a city renowned for having the largest number of hot springs, the greatest variety of mineral-rich spring types, and nearly 3,000 natural sources. Throughout history, Beppu’s hot springs have been praised for their skin-nourishing and health-enhancing properties. This led us to ask a fundamental question:
“What makes skin more beautiful and healthier after a hot spring bath?”
Breakthrough Discovery: The Science of Hot Spring Biotech
Through years of research, we turned our focus to the microscopic life thriving within hot springs. This led to the groundbreaking discovery of
Two unique onsen-derived ingredients:
"Hot Spring Algae Extract",
"Hot Spring Yeast Extract"
These powerful ingredients, unique to Beppu’s onsen, form the foundation of
ONSENSOU ’s patented hot spring biotech formulas, designed to restore balance and vitality to the skin and scalp.
Embracing Nature: A Holistic Approach to Beauty
"Hot Spring Algae Care" for your busy daily
Our "Hot Spring Algae Care" is designed to bring the essence of hot springs and scalp effortlessly. Let the natural benefits of onsen become a part of your self-care ritual, transforming even the busiest days into moments of tranquility and renewal.
Green algae extract
Conditioning ingredients: Reduces damage caused by UV rays and chemicals,
It conditions the scalp while protecting the scalp environment.
Hydrolyzed Yeast Extract
Moisturizing ingredients penetrate deep into the stratum corneum to moisturize the scalp. Prevents dryness and dandruff.
Maintains a healthy scalp environment.
Dipotassium glycyrrhizinate
Prevents deterioration of the scalp environment and provides conditioning and moisturizing.
Create an environment that is easy to reach.

Since the discovery of hot spring algae in 2012, extensive research has been conducted to explore its unique properties and potential applications.
Recently, its novelty, distinct characteristics, and future potential in therapeutic applications have been recognized, leading to the granting of a patent.
This achievement not only reinforces our commitment to ongoing social contribution initiatives but also accelerates our current research on anti-inflammatory, anti-glycation, and antioxidant properties.