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Nature's Healing Water of Japan

Biyusen™

The quintessential heart of IREN Shizen. The miraculous proprietary complex of actives derived from one of the rarest plant-derived moor hot springs in Hokkaido. 

As Featured In

A cruelty-free skincare based on skin condition (not skin type). There are 35 unique combinations.
— VOGUE
The brand is vegan and blacklists more than two thousand toxic or potentially harmful ingredients.
— ELLE
Whether you experience dryness, acne, sagging skin or dullness - you can find a serum to target any skin concern.
— VROUW
Formulas were designed to be safe for all, even individuals with sensitive skin or pregnant women.
— THE NEW YORK TIMES
The beauty is how you can combine the serums, and apply them all at once, without the loss of individual efficacy.
— LIFESTYLE ASIA

Personalise
Your Serums

Consult our dermatologist—she will recommend the best personalized serums that answers to your skin’s unique needs.

Our Difference

The Pursuit of J-Beauty Perfection

Onsen Water

Our line of beauty elixirs is formulated with potent antioxidants and highly nutritious mineral water, exclusively sourced from Hokkaido.

Nature-Derived

Our skincare is holistically made with the Earth's purest ingredients that harness the power of nature to restore skin to its glorious health.

Japanese Rituals

Inspired by Japan's ancient traditions and timeless culture, we craft mindful beauty rituals that bring harmony from an exquisite balance between mind, skin and soul.

Cruelty-Free

Upholding Leaping Bunny cruelty-free global standard, we entirely do not test on animals, nor do our ingredient suppliers or manufacturers.

Vegan

All our products are consciously formulated using efficacy-proven actives and botanicals, with zero traces of animal by-products or ingredients.

Dermatologist Tested

Our advanced formulations utilize only the safest ingredients that are non-toxic and have been proven by expert dermatologists to work wonders on skin.

The #IRENSISTIBLE Club

Give your skin an irresistible glow—share yours with #IRENSISTIBLE and mention @irenshizen for a chance to be featured in our gallery.