BIYUSEN™ Onsen Hydrating Facial Trial

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Dreaming of achieving that viral, glowing glass skin? An onsen facial might be the perfect solution for you.

We’ve partnered with IREN Shizen Skincare to bring Singapore’s first-ever Onsen facial, powered by the science of BIYUSEN™, a unique blend of Onsen water and clinically formulated ingredients. This nature-infused Japanese facial deeply hydrates, replenishes, and unveils a luminous, glass-like glow. As part of IREN Shizen’s onsen skincare philosophy, this treatment channels the rejuvenating essence of Japanese hot springs. Curious about the secrets of Onsen Water and how we crafted this exclusive treatment? Keep reading to discover the magic behind it.

The Science Story Behind BIYUSEN™

A map of Hokkaido highlights Tokachi Obihiro, with an inset of a hot spring and text about Bijin-no-yu, famed as the "hot spring of beauty." Water flows into a wooden bath, offering an onsen facial experience for glowing skin.

The founder of IREN Shizen discovered the secret behind glowing skin while visiting a hot spring resort in Hokkaido, Japan. The locals’ radiant skin was attributed to regular soaks in rejuvenating onsen water, known as “Bijin-no-yu” or “hot spring of beauty.” Inspired by its skin-regenerating effects, he infused this legendary water into his skincare formulations, giving rise to BIYUSEN™. That’s why we decided to formulate a customisable Onsen facial to target various skin concerns, offering a personalised experience for every individual.

Harnessing Onsen’s Secrets for Glowing Skin

Every woman dreams of radiant, youthful skin. With our BIYUSEN™ Hydrating Facial, powered by IREN SHIZEN’s most advanced skincare, you can restore your skin’s natural glow.

Infused with BIYUSEN™, a unique blend derived from fermented moor onsen water, this facial deeply hydrates and rejuvenates your skin, leaving it refreshed and luminous.

What’s So Good About IREN Shizen Skincare?

#1 Using Only Clinically Proven Ingredients

Close-up of clear gel with air bubbles, capturing the essence of an onsen facial, overlaid with a green checkmark.

Fulvic Acid

Boosts antioxidants to enhance hydration and oxygen uptake.

A close-up of oil bubbles in a circular container, reminiscent of an onsen facial experience, with a green checkmark overlay at the top.

Humic Acid

Prolongs hyaluronic acid effects to lock in moisture.

A round, glossy, orange-colored sphere with a green check mark above it resembles the serene glow of an onsen facial.

Ulmic Acid

Smooths texture, heals micro-wounds, and renews skin cells.

Sourced from Japan’s only plant-based hot spring, Moor Onsen Water is rich in humic and fulvic acids and is renowned for its deep hydration, rejuvenation, and healing benefits. After extensive research, our R&D team developed Biyusen™, a powerful complex infused into every IREN Shizen product to nourish and revitalise your skin.

#2 Ban More Than 2000 Ingredients

Skincare product image with text listing ingredients not used: silicones, mineral oil, alcohols, fragrances, parabens, synthetic dyes, sulfates, animal testing. Certified safe, cruelty-free, vegan.

IREN Shizen is proud to be the first Japanese beauty brand to eliminate over 2,000 harmful ingredients, including toxic, comedogenic, and allergenic substances. All products are free from silicones, mineral oils, drying alcohols, fragrances, parabens, and sulfates and are also 100% vegan, cruelty-free, and proudly made in Japan.

#3 Clinically Tested

Agree skin feels softer & smoother*

A circular progress indicator, resembling the serenity of an onsen facial, shows 97% completion with most of the circle filled in gray.

Agree skin feels instantly hydrated*

A circular progress icon with "100%" in the center, reminiscent of complete rejuvenation, much like the refreshing finish of an onsen facial.

Agree skin looks firmer & lifted*

* Based on a 4-week Clinical Trial of 35 subjects aged between 21 and 59.

Recognised as Singapore’s Best Japanese Facial

At Ikeda Spa, we believe that clinical proof should be matched by real-world recognition. That’s why we’re proud to share that our Biyusen Onsen Hydrating Facial was awarded both the Reader’s Choice and the highly coveted Editor’s Choice for “Best Japanese Facial” at the Daily Vanity Beauty Treatment Awards 2025

A gold award banner for Ikeda Spa's BIYUSEN Onsen Facial, winner of the Daily Vanity Beauty Treatment Awards 2025 for Best Japanese Facial.

Winning the Reader’s Choice shows how much our guests love the treatment, and earning the Editor’s Choice is an even rarer honour, reserved for treatments that pass strict expert evaluation for quality, innovation, and results.

These back-to-back wins prove that our onsen-inspired facials go beyond relaxation to deliver visible, science-backed improvements to your skin.

Scroll down to see why the judges and our guests can’t stop raving about it.

Award-winning Results You Can See After Just One Session

Awards are great, but the real proof is in the mirror. After one facial, guests often see plumper, more hydrated, and refreshed skin. See the real before-and-after results from our happy customers below.

Close-up of a person's face before an onsen facial treatment, highlighting the natural light freckles and skin texture. Eyes are covered with a black bar for anonymity. Side profile of a person's face with a black bar over the eyes, accompanied by the text "AFTER" on the bottom right, evoking the refreshing rejuvenation of an onsen facial.
Close-up of a person's face, showcasing skin pigmentation and freckles. The eyes are obscured by a black rectangle. At the bottom left corner, a label reads "BEFORE," hinting at the transformation an onsen facial might bring. Close-up of a person's face with a neutral expression, eyes obscured by a black bar. The image, evoking the tranquility of an onsen facial, is labeled "AFTER" in the bottom right corner.
A close-up side view of a person's face reveals skin texture and some blemishes, reminiscent of a pre-onsen facial moment. The word "BEFORE" is displayed in the bottom left corner. Close-up of the right side of a person's face, showcasing smooth, glowing skin, as if rejuvenated by an onsen facial. The word "AFTER" is elegantly placed in the bottom right corner.
Close-up of the lower half of a person's face with visible acne scars and blemishes on the cheek, suggestive of needing an onsen facial. The eyes are covered with a black bar. "BEFORE" is labeled in the bottom left corner. Close-up of a person's cheek with clear skin, showcasing the rejuvenating effects of an onsen facial. A few visible pores and freckles add character, while the word "AFTER" is displayed in the bottom right corner. Face is partially obscured with a black bar.
Close-up view of skin, highlighting pores and texture, reminiscent of an onsen facial. The word "before" is in the bottom left corner. Close-up of a person's skin with a smooth complexion, reminiscent of an onsen facial glow. A small portion of the eye and cheek is visible, with the word "AFTER" in the bottom right corner.
Close-up of a person's face with an onsen facial treatment applied. Text "BEFORE" appears at the bottom left. Close-up of a person's face showcasing a smooth, glowing complexion reminiscent of an onsen facial, with visible freckles. The person has closed eyes. A green label in the bottom right corner reads "AFTER.

Why Our Guests Love the Biyusen™ Onsen Hydrating Facial

The stunning before-and-after results are just the beginning. This award-winning facial is designed to:

  • Achieve Radiant Glass Skin
  • Brightens Dull Complexion
  • Deeply Hydrates & Nourishes
  • Minimises Pore Visibility & Refines Texture
  • Reduces Wrinkles & Fine Lines
  • Enhances Overall Skin Complexion

Curious how we create these results? Watch the video below to experience the full step-by-step journey of our signature onsen facial, from the soothing cleanse to the final glow.

Step-by-Step Treatment Flow

* Steps available only in Deluxe Course

A woman wrapped in a towel sits on a spa bed holding a mirror while a spa worker in uniform consults with her, clipboard in hand, preparing for an indulgent onsen facial.

Step 1: Personalised Skin Consultation

Your journey begins with a personalised consultation to understand your skin condition, daily lifestyle, and skincare goals, allowing us to customise the facial for the best possible results.

A person lying on a spa bed receives an onsen facial cleanse from a staff member using cotton wool pads; skincare products and towels are nearby. Text reads: “Step 1: Double Cleanse.”.

Step 2: Japanese Double Cleanse Ritual

Following the Japanese philosophy of clean, healthy skin, we perform a meticulous double cleanse with cleansing oil and the Skin Genie Pro silicone cleansing device to remove daily build-up and prepare your skin for maximum skincare absorption.

A person wearing a mask and purple uniform performs an onsen facial treatment on a client lying on a massage table with a white towel and headband.

Step 3: Deep Pore Extraction

Included in our 90 mins Deluxe Onsen Facial

Performed with precision and care, our extraction process clears clogged pores of blackheads and whiteheads to improve skin clarity and prepare your complexion for optimal hydration.

A person receives an onsen facial massage on a spa bed, with a staff member applying oil and pressing key points on the face; skincare products are visible nearby.

Step 4: Signature Japanese Facial Massage

Our signature Japanese massage uses precise acupressure techniques to ease facial tension and encourage healthy circulation, while luxurious facial oil deeply nourishes the skin for a naturally refreshed appearance.

A spa therapist wraps a client’s face with a hot towel during an onsen facial, a traditional Japanese skincare treatment, in a well-lit room.

Step 5: Thermal Hot Towel Therapy

Inspired by traditional Japanese spa rituals, a warm steam towel envelops the skin to soften pores, encourage deep relaxation, and optimise the absorption of premium skincare ingredients.

A spa therapist in a mask applies a white face mask to a client lying on a treatment bed, creating an experience reminiscent of an onsen facial. A bowl of mask mixture is held in the therapist’s hand. Text describes a Vitamin C face mask step.

Step 6: Brightening Essence Mask

Included in our 90 mins Deluxe Onsen Facial

This premium Vitamin C essence mask envelops the skin with nourishing ingredients to help brighten the complexion, improve skin clarity, and reveal a naturally healthy glow.

A person lies on a spa bed with eyes closed whilst a therapist applies eye cream using a metal roller tool during an onsen facial. Skincare products and towels are visible in the background.

Step 7: Lifting Eye Cream Application

Targeted application of the TIMELESS ELIXIR Multi-Lift Eye Cream helps nourish the delicate eye contour, improving hydration while minimising the appearance of puffiness and dark circles.

A woman lies on a spa bed with eyes closed while a therapist prepares to apply serum using a dropper, as part of an indulgent onsen facial. Three serum bottles are arranged neatly on a wooden tray nearby.

Step 8: Bespoke Iren Shizen Application

Tailored to your skin’s unique needs, we perform IREN SHIZEN’s Moisture Sandwich Technique by layering a hydrating water cream, a targeted serum selected from seven specialised formulas, and a nourishing firming cream for optimal skin nourishment.

A person receives an onsen facial treatment with a handheld device while lying on a massage table, covered with a white sheet and towel, in a well-lit room.

Step 9: LED Light Therapy

Included in our 90 mins Deluxe Onsen Facial

We enhance your results with Skin Genie Pro’s advanced LED Light Therapy. Carefully selected light wavelengths are customised to your skin concerns, helping to optimise your complexion’s appearance and overall radiance.

A person lies on a spa bed with a towel wrapped around their head whilst a practitioner applies an onsen facial treatment to their lips using a cotton bud. Spa products and towels are visible nearby.

Step 10: Nourishing Lip Care

A hydrating lip cream is gently applied to nourish and soften the lips, leaving them smooth, moisturised, and beautifully refreshed.

A person in a spa receives an onsen facial sunscreen application on their face from a staff member wearing a purple uniform; skincare products and towels are on a nearby table.

Step 11: Protective UV Finish

Your facial journey concludes with a protective UV finish, applying sunscreen to help safeguard your skin while enhancing the smooth, radiant results of your treatment.

Not sure if your skin is dry or dehydrated? Try this blotting paper test. If the blotting paper doesn’t stick well to your skin , it could be a sign that your skin is dehydrated and lacking moisture there with our BIYUSEN™ Onsen Hydrating Facial your skin receives and intensive boost of hydration to restore healthy, radiant glow all in just one facial.

Ready to achieve deeply hydrated, glowing skin? Explore our FAQs below to learn what to expect before your first BIYUSEN Onsen Hydrating Facial.

Frequently Asked Questions

Is this treatment suitable for me?

The BIYUSEN Onsen Hydrating Facial suits all skin types, including the most sensitive skin. During the session, customised treatment serums are used to address your unique skin conditions and needs.

Is there any downtime after the facial?

This treatment requires no downtime. You can apply makeup and resume your activities immediately.

What results may be expected?

After one treatment, numerous individuals notice visible skin refinement and a more even, radiant skin tone. However, outcomes may differ for each person.

What products do you use for this facial?

We use only premium Japanese skincare products. This facial uses only products from IREN Shizen, crafted with the finest, nature-derived ingredients, sustainably sourced in Japan. At its core is Moor Onsen Water, the rare plant-based hot spring extract renowned for enhancing skin’s natural radiance and deep hydration.

What’s the unique technique used for this facial?

Three-step moisture sandwich technique shown: 1. Water cream application, 2. Serum massage with dropper, 3. Firming cream sealing.

Our facial incorporates IREN Shizen’s professional protocols, featuring the unique “moisture sandwich” technique. This method locks in hydration, ensuring optimal absorption while leaving the skin soft, supple, and revitalised. Thanks to its patented technology, multiple products can be seamlessly blended and applied in a single step without any contradictions.

How many sessions are recommended?

After your first session, you’ll achieve a radiant, glass-like complexion that appears brighter, deeply nourished, and hydrated. We recommend this facial once or twice a month for optimal results.

How long do the results last?

The radiant glow and hydration effects can last 5 to 7 days or longer. For lasting results, regular BIYUSEN Onsen Hydrating Facials are highly recommended.

How long does the treatment take?

The treatment duration varies by package. We offer two facial promotion packages: a 60-minute or 90-minute session for the BIYUSEN Onsen Hydrating Facial, both tailored to suit your preferences.

Exclusive First Trial Facial Promotion Offer

Promotional image for BIYUSEN™ Onsen Hydrating Facial, showcasing onsen facial prices for classic (60 min, $138+) and deluxe (90 min, $168+) courses, with a woman touching her face.

About IREN Shizen

Ikeda Spa has proudly partnered with IREN Shizen, a Japanese cosmetology researcher, since 2019. IREN Shizen’s dedication to true beauty inspires the world to practice the Japanese art of ‘individual beauty’ by creating personalised routines with custom skincare products tailored to each individual and continuous reflection in the rigorous training our beauticians undergo, following strict techniques and protocols guaranteeing consistent, high-quality service that highlights and enhances each customer’s natural beauty.

Circular badge with "Beauty Awards 2024," "Daily Vanity," "Experts' Choice," and "Best Premium Repairing Serum" in pink and white text, reminiscent of the renewing effects of an onsen facial.

Award-winning Japanese skincare, loved for its luxury.

Water flowing from a wooden spout into a pool creates soothing ripples, reminiscent of the tranquility found in an onsen facial experience.

Powered by mineral-rich onsen water from Hokkaido.

Smiling older woman in a white coat with glasses and gray hair, standing indoors near a window, radiating the serene glow of an onsen facial.

Created by Dr Kaori Ishikawa and our female R&D team.

Don’t Miss This BIYUSEN Onsen Hydrating Facial Promotion! Book Now

Read more
  • Valid for 1st-time customers of Ikeda Spa.
  • Valid for local residents of Singapore only. Proof of local residency is required for verification.
  • Prices includes 9% GST
  • Promotion is not allowed to be used with other discounts, promotions, packages or spa vouchers.
  • Non-refundable and non-exchangeable for cash.
  • Reservations are required and subject to availability.
  • Guests are allowed to request a new therapist during the first 10 mins of the treatment if unsatisfied with service quality.
  • Credit card information must be provided to secure your booking.
  • Members must pay by cash as membership credits are not allowed for this promotion.
  • A 48-hour cancellation notice is required; otherwise, charges apply.

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