This is the best gift I’ve ever given myself. It has a delicate texture and a subtle scent. After using this serum, my skin is radiant, hydrated, and looks luxurious! I keep ordering it again and again!
EVERY ORDER CONTAINS FREE SAMPLES
KINS Serum Repair - 30ml
KINS Serum Repair is an advanced Japanese anti-aging serum designed to support mature skin experiencing dryness, loss of elasticity, dullness, and visible aging signs.
Built around the concept of balancing the skin microbiome, the formula uses carefully selected fermented ingredients and bacterial fermentation extracts to help strengthen and harmonize the skin ecosystem while supporting long-term skin health.
Unlike traditional harsh anti-aging treatments, this serum combines powerful yet gentle ingredients like bakuchiol — a plant-derived retinol alternative — with soothing and barrier-supportive components, making it suitable even for sensitive skin.
The lightweight serum absorbs comfortably into the skin, helping restore hydration, resilience, smoothness, and youthful radiance with consistent daily use.
Key Benefits:
Key Ingredients:
How to Use:
Recommended Pairing:
Use together with KINS BOOSTER or KINS BOOSTER MOIST for enhanced results.
Sustainability / Ethical Commitments:
FAQ:
・Is this suitable for sensitive skin?
Yes, the formula is designed to be gentle and suitable for sensitive skin while providing anti-aging benefits.
・What makes bakuchiol different from retinol?
Bakuchiol offers similar skin-smoothing and firming benefits while being gentler and less likely to cause dryness or irritation.
・Can I use this every day?
Yes, the serum is designed for daily morning and evening use.
・Does this help with wrinkles and dullness?
Yes, the formula helps improve elasticity, smooth texture, hydration, and overall radiance.
・Are there any allergens to be aware of?
Some ingredients contain soy-derived components. Those with soy allergies should consult a healthcare professional before use.
We ship internationally from our warehouse here in Tokyo. We use the services of third-party delivery service providers, namely, Japan Post (EMS) and Airmail, for shipping all the orders placed by our customers. View our entire policy here.
Every skin is different, therefore, no returns are accepted simply on the account that the product had an adverse reaction on your skin, or did not provide you any particular kind of results that you were expecting. However, you may initiate a return for the defective and damaged products purchased from the website within a period of7 (seven) days calculated from the order delivery date (“Return Period”). View our entire policy here.
What our customers are saying about this product
Unlike generic beauty retailers, Beauty Ninja carefully curates only the most advanced and luxurious Japanese skincare. Every product is tested and approved for its effectiveness.
Have a question?
See some of our common FAQS below
Yes! We source all products directly from Japanese brands, ensuring 100% authenticity.
In Japan, expiration dates are usually not printed on cosmetics unless required (e.g., food or medicated products). However, we keep small stocks and order directly from manufacturers to ensure you get the freshest products. Most items have a shelf life of 2–3 years when stored properly in a cool, dry place away from direct sunlight.
Visa, MasterCard, Amex, JCB, PayPal, Apple Pay, and Google Pay.
Orders are packed and dispatched within 5 business days (usually much sooner). Delivery by Japan Post EMS then takes up to 7 days. Customs checks can occasionally add a few days.
We ship to over 60 countries, including the USA, UK, Australia, Canada, and most of Europe and Asia. See our shipping page for the full list.
Can't find your answer?
The #1 Destination for High-Tech Japanese Skincare





