Biyusen™

The pure essence of IREN Shizen. A miraculous proprietary complex of active ingredients, extracted from one of the rarest vegetable mud thermal springs in Hokkaido.

Natural Ingredients from Japan 🌿 100% Vegan & Cruelty Free

  • Melon Extract

    Soothes skin, accelerates healing, and stimulates cell regeneration.

  • Goji Berry Extract

    Goji berry, rich in nutrients and antioxidants, reduces wrinkles, stimulates collagen, and protects skin cells.

  • Extract din semințe de dovleac

    Pumpkin seed extract gently exfoliates, brightens the complexion, and rapidly stimulates collagen production, leaving skin smooth and revitalized.

  • Extract de afine

    Blueberries, rich in antioxidants and vitamins B, C, and E, nourish and hydrate the skin, maintain elasticity, and prevent dryness.

  • Extract de Struguri

    Grape extract combats acne and inflammation, fades scars, and protects the skin with antioxidants for a clean and youthful complexion.

  • Yuzu Extract

    Yuzu extract, rich in vitamins C and B, brightens and energizes the skin, stimulates collagen and cell renewal for a radiant complexion.

  • Pomegranate Extract

    Pomegranate extract, rich in nutrients and with powerful anti-inflammatory properties, protects the skin from oxidative stress and UV damage, strengthening the skin barrier.

IREN Shizen FLOWERS IN BLOOM – Cremă Japoneză de Față cu Antioxidanți și Apă Termală BIYUSEN™ - Hidratare Explozivă

An Accidental Discovery

Our journey began when Eric Shinichi, the founder of IREN Shizen, visited a thermal resort in the mountains of Hokkaido, Japan. He accidentally discovered the secret to the locals' radiant skin: weekly baths in the regenerating thermal water known as "Bijin-no-yu," meaning "spring of beauty."

Fascinated by the regenerating effects on the skin, he was inspired to share this beauty secret with the world, infusing this legendary healing water into his skincare formulas, which led to the creation of BIYUSEN™.

IREN Shizen Star Light – Ser iluminator pentru față cu Yuzu Alpha Arbutin și Niacinamide 20ml | Reduce petele

From Onsen to Our Labs

Through the marvels of biotechnology, we have recreated this precious onsen water in our laboratories, preserving the purity and potency of every drop.
BIYUSEN™, this revolutionary lab-created ingredient, is now the central element of every IREN Shizen product, bringing the transformative powers of Japan's most exclusive onsen.

Why are we different?

  • Vegan

    Formulated with active and botanical ingredients, free from animal-derived traces.

  • Dermatologically Tested

    Only safe, non-toxic ingredients, proven by dermatologists to work.

  • Onsen Water

    Formulated with antioxidants and nourishing mineral water, sourced from Hokkaido.

  • Japanese Rituals

    Beauty rituals that bring balance between mind, skin, and soul.

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