Frequently Asked Questions

The first flush shows you immediately, because the rinse water tells the story. Itch and grease usually calm inside the first two weeks. Shedding is a slower system, so give it the full 60 nights, which is exactly what the guarantee covers.

Ten minutes a night is the full reset. If that is not realistic for you, three nights a week still works. Your shampoo goes on at every wash, and the dome can be used every day.

Because you almost certainly already own one, and it was never the problem. The surface it landed on was. The bottle in this box is a cleanser, not a treatment: it clears the surface so the serum you already own finally reaches skin instead of buildup.

About eight weeks at three washes a week. The Tea Tree Scalp Shampoo is $29 at checkout, and the refill ships two more bottles, around sixteen weeks, for $39, only when you order it. Nothing auto-ships and nothing renews.

No. KAMIYU is a cosmetic scalp-care system for a healthy scalp environment. It is not intended to diagnose, treat, cure or prevent any medical condition. If your scalp is broken, bleeding or painful, see a doctor before using it.

IPX7. It lives in the shower. Rinse it under the tap when you rinse yourself.

The dome runs light in the 630 to 680 nanometre range, which is the range studied for follicle support. It only reaches skin once the buildup is off it, which is why the warmth and the kneading come first.

Three things happen at once. Onsen warmth softens hardened oil before anything touches it, 84 counter-rotating nodes work it loose at the root, and red light runs at the follicle. Warmth is the step almost nothing else has, and it is the one that makes the rest work.

USB-C. A full charge runs several weeks of nightly ten minute sessions. There is a built-in timer so you do not have to watch a clock.

The nodes are rounded silicone and they work at the scalp, under the hair, not through the lengths. Long hair is best done wet, in the shower, which is how the whole system was built.

Yes. The system treats the scalp, not the strands. The shampoo goes on at the root and rinses clean. Nothing in the box strips colour.

Yes. Use the applicator along exposed partings and run the dome on wash days. The dome works at the scalp, so it does not disturb the style.

Use the dome on the areas of your own scalp you can reach, and keep the shampoo away from bonds or tape. If you are unsure, email us and describe your setup.

The shampoo dissolves rather than scrubs, which is why we moved away from a grit scrub. Start with two washes a week and build up. If anything stings, stop and email us.

Free on every U.S. order. His & Hers ships express, also free.

Within 48 hours of your order on business days. You get a tracking email the moment it leaves.

Not right now. We ship within the United States only. Join the email list and we will tell you when that changes.

If it has not shipped, yes. Email hello@trykamiyu.com with your order number as soon as you can and we will catch it if we can.

Email us a photo within 14 days and we will replace it. You do not need to send the damaged one back first.

Run the reset for 60 nights. If you do not love what you see, and what you stopped seeing, email us and we refund every cent. We pay the return shipping. The 60 nights count from the day your box arrives.

Yes, we ask for the dome back so it can be recycled, and we send you a prepaid label. You keep the gifts.

No. Every order is one time. The refill only ships when you order it.

Yes. Shop Pay splits the $109 kit into 4 payments of $27.25 at checkout.