An Accidental Discovery
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™.
From Onsen to Our Labs
The Birth of Onsen Facial
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„Ich liebe die Authentizität der Erfahrung hier. Ich genieße es, verschiedene Arten von Massagen neben meinem Onsen zu erleben, und die Vielfalt der angebotenen Behandlungen. Außerdem ist der Service ausgezeichnet, was das Erlebnis außergewöhnlich macht. Ich werde definitiv wiederkommen, um mich verwöhnen zu lassen.“
„Danke Ikeda Spa. Jetzt verstehe ich, warum meine Freundin es mir empfohlen hat… Der Ort ist beruhigend und das Personal wirklich liebenswert. Die Massagen sind ausgezeichnet und sorgen für Entspannung und Wohlbefinden. Es ist sauber und die friedliche Atmosphäre vertreibt jeden Stress.“
Belinda Lee - Lokale Persönlichkeit

Wong Li Lin – Lokale Prominente
Boosts skin's defense with powerful antioxidant, aiding oxygen and water absorption

Miyake - Bloggerin
Extends hyaluronic acid's life, boosts skin moisture, and slows wrinkle formation.

Hymatomelanic acid
Smooths skin texture, heals micro-wounds, and accelerates cell renewal.
Visible Results in 28 Days
Ist diese Aktion für alle zugänglich?
Steam Infusion
Biyusen™ Hydration
A luxurious blend of onsen-derived minerals is infused into the skin, delivering intense hydration, detoxification, and nourishment.
Unsere Philosophie
Wir glauben an personalisierte Hautpflege
Won 43 awards and still counting...
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You can book your appointment with a unique link given after purchase. Please quote the discount code received in your email upon booking (with a minimum purchase of $180).
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This promotion is valid for customers who spend a minimum of $180 in a single receipt on irenshizen.com.sg. Each customer is limited to one redemption only. Customers who have previously redeemed this voucher are not eligible for another redemption.
Willkommensgeschenk
Please present your e-voucher and purchase receipt during your appointment for verification. We reserve the right to cancel your booking if either the e-voucher or purchase receipt is not provided.
Geburtstagsvorteile
No, the voucher is non-transferable and can only be used by the person who made the purchase.
Produktumtausch in Originalgröße
The voucher is valid for 3 months from the date of receipt.
Do I need to make a reservation in advance?
Yes, reservations are required and subject to availability. We recommend booking at least one month in advance.
500 Punkte
GOLD
This promotion is valid only for local residents of Singapore. Proof of residency is required.
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