IC. U
IC.U W Serum, 150ml
IC.U W Serum, 150ml
@cosme rating: 5.3/7.0
For firm skin that will continue to glow for the next 10 years
✓ 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
Backed by cutting-edge dermatological research, this beauty formula, including histidine, boosts firmness and elasticity from the inside out. This two-layered lotion contains an unparalleled amount of emollients, instantly and effectively delivering a rich, firm feeling and a radiant glow. It's fragrance-free, colorant-free, paraben-free, and synthetic colorant-free, and has been allergy-tested (although this does not guarantee that it will not cause allergies in all individuals). *The color of the product is that of natural ingredients.
Ingredients
Water, Butylene Glycol, Dipropylene Glycol, Glycerin, Mineral Oil, Alcohol, Triethylhexanoin, Sodium Polyaspartate, Adenosine, Tremella Fuciformis Extract, Tocopherol, Hyaluronic Acid Propylene Glycol, Histidine, Hydroxyproline, Polyquaternium-51, Resveratrol, Hydrolyzed Collagen, Disodium EDTA, PPG-9 Diglyceryl, Sodium Alginate, PEG-50 Hydrogenated Castor Oil Isostearate, Octyldodecanol, Phytosteryl Oleate, Carrageenan, Citric Acid, Sodium Citrate, Cholesterol, Isopropyl Myristate, Disodium Phosphate, Sodium Phosphate, Hydrogenated Polydecene, Hydrogenated Lecithin, Phenoxyethanol, Caramel
How to use
Shake the container well before use. Use on clean skin after washing your face. Take an amount about the size of a 500 yen coin into the palm of your hand and gently apply to your entire face. When using a cotton pad, be sure to soak it generously. *For better results, apply multiple layers. Due to the characteristics of the product, in rare cases, white liquid may adhere to the walls of the container or clear liquid may be visible at the top, but this does not affect the quality. The color of the contents is the color of natural ingredients. When using, be careful not to stain clothing. If it gets on clothing, immediately wash it with water. After use, close the cap tightly. Do not store in a high temperature location.
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.
It had such high reviews here that I was intrigued, so I bought it and used up the whole bottle. It's a rare two-layered lotion. Shake it before use. It contains oil, so it's very moisturizing when applied. It's more like a thick serum than a lotion. It leaves your skin feeling plump and supple. It's not a sticky oil, but rather has a rich consistency like a lotion or cream. It's not only moisturizing, but also gives your skin a firming effect that's completely different. This lotion alone is enough to give you firmness. I think it's perfect for the dry winter season.
I think it's a doctor's cosmetic from the KOSE series. The product is amazing. It's very moisturizing and leaves skin feeling soft. The oil gives it a shiny, glossy finish. I used it for a while, but I love the lotion and want to try other products, so I'm not using it now. I'll probably buy it again.
The balance of oil and moisture has improved greatly. My skin condition has improved. I will buy it again.
I tried the sample and liked it, so I bought the full product. I prefer watery lotions, but I think a thicker one would be better in the winter. One application leaves my face feeling moisturized and radiant, and firm. A small amount of liquid foundation afterward also spreads smoothly and leaves a radiant finish. Maybe it's because I'm also using the cream from this series, but it seems like my jawline has become firmer and more lifted? It might be a little sticky in the summer, but I plan to give it a try for the time being.