MEGAMIS
MEGAMIS Hair serum, 180ml
MEGAMIS Hair serum, 180ml
@cosme rating: 5.0/7.0
A serum bomb to use between shampoo and treatment!?
✓ 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
The highly concentrated penetrating formula allows the beauty ingredient isostearic acid to penetrate deep into the hair, moisturizing it to the core. The formula, which was developed after repeated testing of over 1,000 different formulations, repairs the inside of the hair.
Ingredients
Water, isopentyldiol, PEG-30 phytosterol, isostearic acid, fragrance, steartrimonium chloride, glycine, arginine, histidine, hydroxyethylcellulose, glycol distearate, cocamidopropyl betaine, glyceryl oleate, ethanol, sodium laureth sulfate
How to use
1. After shampooing, lightly dry your hair, dispense an appropriate amount of hair serum into your palm, and work it thoroughly into your entire hair. *No need to leave it on for a while. 2. Without rinsing the hair serum, apply the treatment on top and rinse it off. Can also be used by applying it directly to your hair. The recommended amount for semi-long hair is approximately 8-10m (2 palm-sized applications). Adjust the amount according to your hair length and type. We recommend using it together with MEGAMIS shampoo and treatment.
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's not a milk, it's a serum. I bought it without checking carefully. I was supposed to apply this serum, then conditioner, and then rinse them all out, but I didn't notice and only realized it when I was towel drying. I just applied it and let it dry. There's plenty left, so I'll try using it again. The scent is really nice.
Megamis is a hair-busting shampoo developed by Lion, a major brand. It doesn't have much presence on the shelves, and it hasn't received particularly impressive reviews from hairdressers. Apparently, the fact that you have to use a serum between shampoo and conditioner is what's bringing down its ratings. This time, I used just the shampoo and conditioner without the serum, and it worked fine and was just fine. It left my hair feeling moisturized and slightly heavy.
The packaging is cute, with a design reminiscent of a tarot card. While it doesn't have any dramatic effects on its own, the sweet scent combined with the mild treatment and conditioner creates a synergistic effect, like a charm that makes hair smooth and silky. I couldn't tell the difference when my hair was wet before using the hair dryer, but once I was about 80% dry, I noticed a slight shine and moisture in my bleached hair, which tends to dry out. I'll continue using it in the winter, hoping to keep my hair moisturized to combat static electricity and make it easier to style. After purchasing it online at Atcosme, I found out it was also available at my local drugstore.
Sorry... it didn't suit me. Or rather, I think my hair is just dead. For now, only Tsururincho suits me. I want to keep the price down, so I want to find something good... I've had my hair straightened (hair straightening) and dyed my gray hair. This time, I had my hair straightened, but it's still frizzy, so I'm sorry that this is only helpful to people with dead hair.
The shampoo is really good. It's smooth and easy to run your fingers through. The conditioner was a little lacking, but it seems to work well with the serum. I really liked that I could buy a sample size.