Our journey began when Eric Shinichi, founder of IREN Shizen, visited a hot spring resort in the mountains of Hokkaido Japan. He made a chance discovery of the secret behind the locals’ naturally glowing skin: their weekly soaks in the rejuvenating onsen water known as “Bijin-no-yu”, which means hot spring of beauty. Fascinated by the skin-regenerating effects, he was inspired to share this beauty secret with the world by infusing this legendary healing water into his skincare formulations, culminating in the creation of BIYUSEN™.