one
to/one Brightening Booster Serum, 55ml
to/one Brightening Booster Serum, 55ml
@cosme rating: 5.0/7.0
For skin that is moisturized, clear, and radiant.
✓ 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
For skin that is moisturized, clear, and radiant. The first step to prepare the foundation and awaken clarity. Contains ionized water and natural brightening ingredients, focusing on penetration and skin sensation. This is an introductory serum that prepares the stratum corneum, the foundation of the skin, at the start of skin care, making it easier for beauty ingredients to be absorbed. It brings out the potential for bright, fresh skin.
Ingredients
Water, Propanediol, Butylene Glycol, Ascorbyl Glucoside, Glycerin, Hibiscus Flower Extract, Carnation Flower Extract, Opuntia Ficus-Indica Seed Oil, Tocopheryl Acetate, Rosemary Leaf Extract, Sage Leaf Extract, Aldweiss Flower/Leaf Extract, Lavender Flower Extract, Evening Primrose Oil, Yarrow Extract, Lavender Oil, Pelargonium Graveolens Oil, Roman Chamomile Flower Oil, Rosemary Leaf Oil, Cananga Odorata Flower Oil, Lavandula Hybrida Oil, Litchidi Fruit Oil, Bergamot Fruit Oil, Orange Oil, Hydrolyzed Jojoba Esters, PEG-40 Hydrogenated Castor Oil, Citric Acid, Sodium Citrate, Succinoglycan, Sodium Benzoate, Potassium Hydroxide
How to use
Take an appropriate amount in the palm of your hand and apply it to your entire face.
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 was looking for a whitening serum, and I was interested in to/ne's pink serum, so I bought this! It's a booster serum, so I can use it in conjunction with other vitamin C serums, which is why I love it. The scent is soothing. However, I haven't noticed any results yet. Maybe my skin tone has brightened a little? I'll try using it until the end.
I usually use beauty serums from department stores, but I thought I'd try something cheaper, and since it's summer, I bought this whitening serum. It doesn't irritate my skin, my lotion absorbs better, and while I'm not sure if my skin has become whiter yet, it seems like it will be worth continuing to use.
I have used the regular booster before, and it still penetrates the lotion very easily. I've been using it for about four weeks, so I'm not sure about the whitening effect yet, but I'd like to continue using it!
I had previously used the orange booster serum, and was looking for a nighttime booster when I found this one with brightening effects and bought it. The texture is a thick gel, and it feels refreshing when used. It has a refreshing herbal scent and blends in easily. I have combination skin that leans towards oily, so I don't like sticky skin, but this doesn't bother me at all. It also feels moisturizing. I wasn't able to really notice the brightening effect, but I thought it was a mild booster that anyone could use.
It has a refreshing feel and is easy to use.