Kirei＆co.
Kirei & Co. Wrinkle White Serum, 10ml
Kirei & Co. Wrinkle White Serum, 10ml
@cosme rating: 4.3/7.0
Medicated serum for wrinkle improvement and whitening*
✓ 100% authentic
✓ Ships from Japan in 3-5 days
✓ Duties prepaid for US orders
✓ Tracked delivery via Japan Post
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What it is
A medicated beauty essence containing the active ingredient niacinamide to improve wrinkles, and moisturizing ingredients double hyaluronic acid and double collagen. *Suppresses melanin production and prevents age spots and freckles
Ingredients
Niacinamide. Other Butylene Glycol, Sodium Stearoyl Glutamate, Acrylic Acid/Alkyl Methacrylate Copolymer, Ethanol, Scutellaria Baicalensis Root Extract, Carboxyvinyl Polymer, Licorice Extract Powder, Collagen Tripeptide F, Neopentyl Glycol Dicaprate, Glyceryl Triethylhexanoate, Ginseng Extract, Methyl Parahydroxybenzoate, Sodium Hyaluronate-2, Geranium Robusta Extract, Phenoxyethanol, Peony Extract, Dimethicone, Sorbitan Stearate, POE Sorbitan Stearate, Polyglyceryl Stearate, Saxifraga Saxifraga Extract, Petrolatum, Hydrolyzed Hyaluronic Acid, Hydrogenated Rapeseed Oil Alcohol, Glyceryl Stearate SE, Lipophilic Glyceryl Stearate, Potassium Hydroxide, Water-Soluble Collagen (Fish Origin), Fermented Soy Milk, Concentrated Glycerin, Liquid Paraffin, Purified Water.
How to use
At the end of your morning and evening skincare routine, take a pearl-sized amount onto your fingertips and apply it to your entire face, focusing on problem areas.
We ship internationally from Japan!
Frequently Asked Questions
Is this authentic?
Yes. We only buy from official retailers and directly from the brands here in Japan. Never resellers, never grey market stock.
We are beauty lovers too, so we know the worry, especially with something you are putting on your face. Authenticity is 100% guaranteed by us.
What are your shipping rates?
On orders under US$75, shipping is a flat US$20 to the United States and US$10 to all other countries.
Orders of US$75 or more ship free, applied automatically at checkout. Your exact shipping cost is shown before you pay.
How long does delivery take?
These estimates are for International Airmail (Tracked) and include 3 to 5 business days of processing in Japan.
- United States: 12 to 15 business days
- Canada, United Kingdom, France, Germany: 9 to 12 business days
- Australia, New Zealand, Denmark, Finland, India, Indonesia, Italy, Netherlands, Spain, Sweden, Switzerland: 10 to 13 business days
- China, Hong Kong, Malaysia, Singapore, South Korea, Taiwan, Thailand, Vietnam: 8 to 10 business days
- Rest of the world: 11 to 18 business days
Actual delivery can be affected by customs clearance, seasonal congestion, or carrier delays in the destination country, all of which are outside our control.
Do you offer express shipping?
Yes. As of 22 July 2026, we offer International Express Mail through Japan Post. The cost is based on order weight and is calculated automatically at checkout.
Will I pay customs or import fees?
US orders: No. As of July 1, 2026, all US orders ship DDP (duties delivered prepaid), meaning we prepay all import duties on our end. Nothing is due at your door.
Orders outside the US: Possibly. Duties and import taxes are set by your local customs authority and are not collected at checkout, so any charges on delivery are your responsibility.
We're working on rolling out prepaid duties for more countries soon.
I bought this because it was gel-type, medicated, and inexpensive. Wrinkle care products often leave me with pimples around my eyes, but gel-type products have generally worked well for me in the past, so I thought this might work too. However, when I applied it all the way around my eyes, I still got pimples. I narrowed it down to just the outer corners of my eyes, where I was a bit concerned about pigmentation, and it was fine. Since I only had to apply it to a smaller area, it seems like a great value for the money. I'm not sure how effective it is, but I'd like to think it's probably because it's more moisturizing.
It contains plenty of niacinamide, an active ingredient that helps improve wrinkles and whiten skin, so you can expect beautiful white skin just by applying it! It's easy to apply and quickly absorbs into the skin, so I recommend it. It's so high quality you wouldn't believe it's only 500 yen!
It's non-sticky and perfect for applying before makeup. It's not enough for nighttime use, but the price is amazing. I'm glad it's medicated.
I used up the whole bottle. It's a very watery, thick gel that absorbs easily into the skin, and I ended up spreading it all over my face. It's hard to say for sure if it has a whitening effect unless you use it for a long time, but it does make my skin feel plumper and more vibrant. It's small, but it's a quasi-drug, the moisturizing ingredients are impeccable, and I'm surprised it's only 500 yen for such quality that I can't find any flaws. I haven't noticed any dramatic changes, but I think it's quite reliable.
The fact that it comes in a bag makes it easy to carry around, and I thought it would be great for traveling. I don't really notice any moisturizing effect.