IROIKU
Iroiku Skin Tune Up Serum (22 Lime Green), 18ml
Iroiku Skin Tune Up Serum (22 Lime Green), 18ml
@cosme rating: 4.4/7.0
For skin that is concerned about redness
✓ 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 luxurious blend of eight beauty ingredients. A tinting serum that brightens your skin with just one application. Its sheer application gives a natural, bare-skin look. Continued use leads to healthier skin.
Ingredients
Water, hydrogenated polydecene, pentylene glycol, glycerin, ascorbyl glucoside, diglycerin, dimethicone, BG, behenyl alcohol, pentaerythrityl tetraethylhexanoate, petrolatum, honeysuckle flower extract, peppermint leaf extract, tea leaf extract, Dioscorea pantaica root extract, Boswellia oleracea extract, Job's Tears seed extract, grape leaf extract, Matecha leaf extract, jojoba seed oil, isostearic acid, ethanol, glyceryl caprylate, carbomer, xanthan gum, citric acid, silica, tremella fuciformis polysaccharide, sodium hydroxide, Glyceryl stearate, PEG-10 stearate, Sodium stearoyl glutamate, Tocopherol, 10Na pentetic acid, (Glycerylamide ethyl methacrylate/Stearyl methacrylate) copolymer, Ylang Ylang Flower Oil, Citrus Aurantium Dulcis (Orange) Peel Oil, Coriander Fruit Oil, Rosa Damascena Flower Oil, Pelargonium Graveolens (German Palm Oil), Palmarosa Oil, Citrus Nobilis (Tangerine) Peel Oil, Lavender Oil, Chamomile Flower Oil, (+/-) Synthetic Fluorphlogopite, Tin Oxide, Titanium Oxide, Iron Oxide, Aluminum Hydroxide, Nanban Eye Leaf Extract, Ammonium Polyacrylate
How to use
1. After washing your face, dispense a coin-sized amount (0.6 mL) into the palm of your hand. 2. Place an appropriate amount on your forehead, cheeks, and chin, and use your fingers to massage the skin in circular movements, lifting it up, until it blends into your entire face. 3. Take another small amount onto your fingertips and apply it to areas prone to dryness, such as around the eyes, mouth, and chin, blending gently. *If you feel your skin is not moisturizing enough, use this product after applying your regular lotion. *For those who are concerned about sunburn, we recommend using your regular sunscreen after using Skin Tune Up Serum.
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.
That was good.
I thought it would be a watery powder or CC cream, but it doesn't have any UV protection and requires layering with UV powder. The manufacturer originally made products for delicate skin, so perhaps they were concerned about the burden of UV protection ingredients. It feels like a serum, and blends well with the skin. If your base creases or lifts due to dryness or roughness, it seems like you'll get a better finish by adjusting the tone with a tinted serum and then layering with powder. The cap is beautiful, and refills are available.
I won a gift from Suzykirei for a tinted serum with increased moisturizing power. The tinted serum doesn't have high coverage, but it does tone up the skin nicely and covers up any unevenness in the skin. When I applied the powder that came with it, it left my skin feeling beautiful. The fresh scent of the serum was also refreshing, which I liked. It's perfect for days when I wear light makeup or no foundation, but after half a day it blends into my skin and loses its freshness. The tinted serum doesn't have any sunscreen, but the powder does, so I wasn't sure if I wanted the powder to have any sunscreen effects, so I used the brush that came with it. I would like to use it in the spring and summer, as applying it firmly with a puff can be drying, but as I have photoallergies, SPF 30 is too much for me in the summer. I apply the FAS sunscreen cream first, and then the serum, so the order of application is reversed due to the texture, and it ended up being a bit uneven. The waterproof sunscreen from Koh Gen Do that I use in the summer has a lotion-like texture, and I was worried that the waterproofness would repel the serum, but this one actually finished better, so I would like to use it on spring and summer days when I don't wear foundation. If this serum had sunscreen properties, I would definitely buy it again, so it's a bit disappointing.
I recommend this for sensitive skin and those who don't want to look like they're wearing makeup. Surprisingly, number 21 is a color that can be used on any skin tone! The application and packaging are very cute, and you can purchase refills when you run out. The only downside is that it doesn't have sunscreen properties... but I think it's quite gentle on the skin, which is a big downside for me.
I won the 21 Coral at Cosme lottery and received this product. I'm cool-toned, and using it alone makes my skin tone a little darker. It has a lovely aroma, and a little goes a long way. I use it as sunscreen and then apply cushion foundation over it. It feels great.