IREN Shizen's founder, Eric Shinichi, had always appreciated Japan's culture. On a trip to a hot spring resort in Hokkaido, he made a chance discovery of the locals' natural glowing skin. He learned that they soaked in a moor hot spring called "Bijin-no-yu", which means hot spring of beauty.
Hidden in the pristine forest of Hokkaido, the secret to beautiful skin was uncovered on the bank of the Tokachi River. There lies the one and only plant-based hot spring in Japan: Moor Onsen Water.
Inspired by the miraculous discovery of locals bathing in moor onsen water for naturally smooth skin, it hinted at a sacred skincare ingredient that was eventually created. This beautifying onsen water is the epitome of skin rejuvenation.
Amazed by the skin-regenerating powers, Eric decided to share this beauty secret with the world by infusing moor hot spring water into his skincare formulations, eventually creating Biyusen™.
This proprietary complex of actives is the cornerstone of our skincare. Derived from the rarest plant-derived moor hot spring in Hokkaido, this wonder water is found in only one location in Japan—carefully integrated into the heart of every IREN Shizen products today.
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