Iren Shizen - The Japanese Balance of Nature and Science

Iren Shizen represents the harmony between Japanese tradition and French biotechnology. The brand was born out of a desire to create skincare that responds to the skin’s real needs without compromising between efficacy and safety. Behind the formulas stands Dr. Mika Watanabe, dermatologist and researcher, who together with her team in Tokyo develops recipes that combine natural ingredients with scientific innovation.

The name IREN symbolizes science inspired by Irène Joliot-Curie, a pioneer in chemistry and a champion of women in science.
Shizen (自然) means nature – regarded in Japanese culture as the source of harmony and beauty. Together, they form the brand’s philosophy: pure, transparent, and effective skincare, rooted in nature and refined by science.

The story of Iren Shizen began when the brand’s founder, Eric Shinichi, visited a mountain hot spring resort in Hokkaido, Japan. There, he discovered the secret behind the locals’ naturally glowing skin. It was thanks to their regular baths in the rejuvenating onsen water known as “Bijin-no-yu,” the “Hot Spring of Beauty.”

Inspired by this discovery, Eric and a team of scientists decided to recreate this unique water in the lab, giving birth to Biyusen™ – a biotechnological essence based on the thermal spring water of Tokachigawa Moor.

Reproduced with a precise balance of minerals and organic acids, Biyusen™ is rich in humic and fulvic acids, known for their regenerative and antioxidant properties. It helps hydrate, strengthen, and rebalance skin exposed to environmental stress.

Thanks to the Encapsulated Biyusen™ patented technology, every active ingredient is enclosed in microcapsules that gradually release nutrients into deeper skin layers, maximizing their effectiveness. Iren Shizen’s formulas combine superfoods, botanical extracts, and biotech ingredients in the spirit of clean beauty: free from silicones, parabens, PEGs, alcohol, and artificial fragrances.

Iren Shizen redefines skincare: instead of focusing on skin type, it focuses on the skin’s current needs. The Superfruit Booster line features seven targeted serums that can be mixed and matched daily: from hydration and soothing to brightening and blemish reduction.

The Flowers in Bloom and Freeze the Youth cream lines were tested under harsh winter conditions in Hokkaido to confirm their effectiveness in protecting the skin’s hydrolipid barrier. Each product works precisely and synergistically, following the Japanese “layering” philosophy, where each step of the routine builds harmony and balance within the skin.

Iren Shizen is a contemporary Japanese brand that unites minimalist design, vivid packaging colors, and scientific precision. The products stand out beautifully on retail shelves, drawing customers’ attention at first glance. Collaboration with 4 Seasons Beauty provides access to a curated product selection, marketing materials, and attractive business conditions.
Now is the perfect time to introduce a new generation of Japanese skincare to your offer – with a brand that is rapidly earning global consumer trust.