BIYUSEN™ Onsen Hydrating Facial Trial
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™
The founder of IREN Shizen discovered the secret behind glowing skin during a visit to 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, resulting in the creation of 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, leaving your skin refreshed and luminous.
What’s So Good About IREN Shizen Skincare?
#1 Using Only Clinically Proven Ingredients
Fulvic Acid
Boosts antioxidants to enhance hydration and oxygen uptake.
Humic Acid
Prolongs hyaluronic acid effects to lock in moisture.
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, renowned for their 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
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*
Agree skin feels instantly hydrated*
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
Winning the Reader’s Choice shows how much our guests love the treatment, and earning the Editor’s Choice is an even rarer honour, given only to 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.
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
- Step 1: Double Cleanse – Deep cleanse with oil + device brush
- Step 2: Extraction* – Remove blackheads and unclog pores
- Step 3: Face Massage – Acupressure massage to tone and lift
- Step 4: Hot Towel Therapy – Open pores with warm steam towel
- Step 5: Vitamin C Mask* – Brighten and refresh skin
- Step 6: Eye Cream – Reduce dark circles and puffiness
- Step 7: Moisture Sandwich – Layered hydration for lasting glow
- Step 8: Layer 1 (Water Cream) – Prep skin for maximum absorption
- Step 9: Layer 2 (Serums) – Up to 3 serums for your concerns
- Step 10: Layer 3 (Firming Cream) – Lock in moisture and lift skin
- Step 11: LED Light Therapy* – Target skin concerns with light
- Step 12: Lip Cream – Hydrate and add shine
- Step 13: Sunscreen – Finish with sun protection
* Steps available only in Deluxe Course
Frequently Asked Questions
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.
This treatment requires no downtime. You can apply makeup and resume your activities immediately.
After one treatment, numerous individuals notice visible skin refinement and a more even, radiant skin tone. However, outcomes may differ for each person.
We use only premium Japanese skincare products. This facial only uses products from IREN Shizen, crafted with the finest, nature-derived ingredients, sustainably sourced from 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.
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.
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.
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.
The treatment duration varies based on the chosen 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
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.
Award-winning Japanese skincare, loved for its luxury.
Powered by mineral-rich onsen water from Hokkaido.
Created by Dr Kaori Ishikawa and our female R&D team.
Don’t Miss This BIYUSEN Onsen Hydrating Facial Promotion! Book Now
- 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.
Probably the Best Japanese Spa in Singapore
