oct
oct Shampoo, 320ml
oct Shampoo, 320ml
@cosme rating: 5.5/7.0
Medicated shampoo that prevents dandruff and itching
✓ 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
Winner of the 2011 SuzyKirei Best Cosmetics Awards' 7th place in the shampoo and conditioner category! Formulated with the highly effective medicinal ingredient "Octopirox," this product prevents dandruff and itching and also has excellent deodorant properties. Dandruff and itching are primarily caused by the oxidation of sebum secreted from the scalp and the proliferation of resident bacteria that feed on sebum. The antibacterial and antioxidant properties of "Octopirox" effectively penetrate every corner of the scalp, suppressing dandruff and itching. It cleanses thoroughly without leaving a rough scalp, leaving it clean. It has a gentle, mild floral scent. (Quasi-drug)
Ingredients
How to use
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 had a lot of yellow, smelly dandruff...it didn't go away even after shampooing, and I was worried about it. I found out that Octo was good, so I tried it and it improved within a week. It's now completely cured and I'm using a different shampoo.
I tried this shampoo because moisturizing and damage care shampoos are too heavy and don't lift my roots. In that respect, I think it's good. It doesn't feel sticky even in the evening.
I saw this shampoo recommended on social media, so I bought it to try it out. My usual shampoos tend to make my hair itchy and sticky after a day, but this one doesn't make my hair itchy even though it's sticky, and I found it easy to use. However, the design seems a little old-fashioned, and the contents are a greenish color, so it might not be suitable for people who value cuteness.
It's written for the scalp, but it doesn't improve the quality of your hair, so I only use it occasionally.
Even when I had long hair, this one product kept it smooth. I'm prone to dandruff, so I've been using this product, which claims to be an anti-dandruff treatment, for 10 years now. I've tried other shampoos, but the itching and dandruff got worse, so I came back to this one. I haven't had any skin problems, my hair stays manageable, and I've used it after coloring it, with almost no damage.