For Flakes · Grease · Itch · Shedding
★★★★★ 4.9 average · 46,874 scalps reset · 60-Night Black Shirt Guarantee
Kamiyu clears suffocated follicles, the hidden root cause behind flakes on your shoulders, grease by 4pm, an itch you keep finding, and hair that sheds a little more every year.
Lint roller in my desk. Lint roller in my car. Lint roller in the hall closet. If that is you, listen: the rinse water ran GREY the first night and I had washed my hair that same morning. The itch was gone by week two. Get the complete kit and throw the rollers away.
The Scalp Battle
What is behind the flakes, the grease by afternoon, the itch in the middle of a meeting? Simple. Your scalp is sealed under a layer of buildup, and nothing you have ever used has reached it. Your hair cannot do its job on skin that has never been washed.
一Watch what your fingers actually do
Shampoo cleans hair. That is all it does. Your fingers slide over the top. The skin underneath, where the oil and the buildup live, never gets touched. Ten years of showers. Zero scalp washes.
So we built the fix. The Japanese head spa scalp wash, rebuilt to run inside the shower you already take. The dome drives your shampoo down to the skin. Heat. Pressure. Red light. Straight at the root. The first real wash your scalp has ever had.
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Navy, charcoal, “basically black.” Real black stayed on hangers for six years. Saturday I wore an actual black turtleneck to my sister’s dinner. If you know, you know.
I used to clear the drain catch before my husband showered so he wouldn’t see how much was mine. Week two, I stopped pre-cleaning it. He hasn’t said anything. There’s nothing to say anything about.
Ponytail Monday, bun Tuesday, dry shampoo emergency Wednesday. Since college. Day two my roots still looked like day one and I checked my calendar to make sure it was actually Tuesday.
My colorist stopped mid-foil and asked what I changed. Eleven years in her chair and she’s never once asked me that. I said “it’s a Japanese thing” like I’ve always had my life together.
You Are Not Imagining It
Not dandruff shampoo failure. Dead skin and hardened oil, lifting off a scalp that has never been cleaned under the hair.1
A stripped scalp panics and pumps more oil. The more you wash, the faster it comes back.2
Buildup pressing on the follicle. You scratch it in meetings without noticing. Look under the fingernail.3
Follicles choked at the root grip the hair weakly. It lets go in the shower, a little more each season.4
Your scalp makes more oil than any other skin on your body. Shampoo is built for hair, so it skates across the top of it and rinses away.
Malassezia lives on nearly every adult scalp. It cannot make its own fat, so it feeds on yours and leaves an acid behind on the skin.
Irritated scalp replaces its surface at roughly double speed, in clumps big enough to see. Those clumps are what lands on your shoulders.
Break the first link and the other two have nothing left to run on. That is the whole job.
二The Part Nobody Told You
Three washes a week since you were fifteen. Twenty-five years later, that is 3,900 washes. Now count how many ever cleaned your scalp. Not the hair. The skin underneath it.
The hair
Shampoo glides over the top, cleans the strands, and rinses away.6
The skin underneath
More oil than any other skin on your body,5 mixed with dead skin, dry shampoo and hard-water minerals. It compresses. It hardens around each follicle like wax around a wick.
Trichologists call it buildup. We call it the sebum plug. Blocked follicles grow hair weaker, thinner, and quit earlier. And every expensive drop you put on top of the plug stays on top of the plug.
This is exactly why the Japanese head spa exploded: a one-hour treatment in three moves, comb, apply, knead, that treats the scalp like skin, because it is skin. Los Angeles caught on, then London. Sessions run $150 and the waitlists run months.
The steps were never the secret. The access was.
Why Nothing Has Worked
Dandruff shampooStrips the surface, misses the plug, and dries the scalp until it doubles its oil in defense. The flakes come back with backup.
Growth serumsGood actives, wrong landing zone. On a plugged scalp your serum sits on the wax, not the wick. Fertilizer poured on pavement. Keep the bottle. It was never the problem. The surface it landed on was.
Fingernails + plastic brushesThey scratch the surface and inflame the skin. A head spa therapist never scratches. They knead. Pressure, rotation, at the root, under water.
The $150 salonIt genuinely works. Once. Then the plug rebuilds for four weeks while you wait for the next opening. A salon reset lasts about a week. The ritual keeps it. $3,900 a year, if you keep going back.
WaitingThe plug does not plateau. Follicles miniaturize under pressure. The good news cuts the other way too: cleared follicles recover. Which is why starting matters more than everything above.
Every one of these is still in the cupboard. Not one of them ever reached the skin.
Introducing
The Japanese Scalp Reset: every tool of the $150 head spa, rebuilt to run inside the shampoo you already take. The first scalp wash of your life happens tonight.
This is the hour I stood behind a chair for, taken apart and rebuilt for a shower. Same movements. Same order. Your hands instead of mine.
Still the same shower you were taking anyway. The only new thing is where the shampoo goes.
The Kamiyu Dome+84 silicone nodes on counter-rotating heads knead the way a head-spa therapist's hands knead: pressure, rotation, at the root, under water. Onsen warmth softens hardened buildup, and 630-680nm red light lands where it matters. IPX7 - it lives in the shower.
The Scalp ScopeFREE+A magnifying camera that shows your scalp on your phone. The salon shows you your scalp once, then charges $150 to show you again. Night 1 vs night 30, on your own screen.
The Scalp ApplicatorFREE+Hollow silicone teeth press shampoo directly onto the skin, under the hair - the way a salon applies it to a parted scalp, never rubbed into hair and hoped.
The Scalp CombFREE+Stiff hollow teeth rake buildup off the skin itself - front to back, before the water. It cleans the scalp, not the hair, and one press of the button clears the comb.
The Japanese Scalp Health GuideFREE+The full method, printed and sent digitally after checkout: the sequence, the timing, and what to look for on the Scope, week by week.
1-Year Dome WarrantyFREE+It breaks, we replace it. One year, no questions, covered door to door.
Bought this for my own flakes, and my husband made fun of it for a week. Then he used it once and now we argue about whose turn it is. I do not know how to describe it except my head feels decompressed after. Ordering the second dome so we stop fighting.
From kami, hair, and yu, the water of the bath. The hair bath. The Japanese practice of washing the scalp itself, not just the hair. Practiced in Tokyo salons for decades. Performed in American salons for $150 a session. Now performed in your shower. TikTok made it famous. Japan made it a standard.
Why Kamiyu Exists
My name is Nao Kurihara. I spent twelve years with my hands on other people’s scalps.
Not hair. Scalps. In Japan the scalp is treated as skin, and skin gets washed. I did it six days a week for over a decade and I stopped counting somewhere in the thousands.
I photographed almost all of them. Every client got a scan before I started, magnified onto a screen and turned around so they could look. For most of them it was the first time they had ever seen their own scalp. The flakes crusted in rings around each opening. The film sitting over the follicles like wax over a wick. Grown adults going quiet in the chair. One woman asked me to turn the screen off. She still rebooked.
Then I did the work. It worked. And they booked again for four weeks out.
That is the part I could not get past. The treatment was excellent. But it happened to people instead of being done by them, and the hour never survived the drive home. Same scalp, same chair, same condition, four weeks later, for twelve years.
I did not want to open a second salon. I wanted the hour to survive the drive home.
Kamiyu is that hour, rebuilt to run in your own shower, on your own head, with the shampoo you already own. And the scan I used to give people in the chair is in the box, so this time the after picture is yours.
The Salon Ritual
Every appointment I ever gave had the same steps, in the same order. Swipe through them.
1The Look
The scope goes on the scalp and the screen turns around. You cannot fix what you have never seen. In your box: the Scalp Scope.
2The Comb
Dry, through the hair, before any water. It opens a path so the cleanser can reach skin. In your box: the acacia comb.
3The Apply
Cleanser pressed straight onto the parted scalp. Never rubbed into hair and hoped. In your box: the applicator and the shampoo.
4The Knead
Pressure, warmth and red light, worked into the skin. The step that makes it a treatment. In your box: Kamiyu.
That is the whole appointment. All four steps, same order, your shower.
The honest comparison
| KAMIYU | Shampoo alone | Growth serum | $150 head spa | |
|---|---|---|---|---|
| Clears the buildup the yeast feeds on | ✓ | ✗ | ✗ | ✓ |
| Treats the skin, not the strand | ✓ | ✗ | ✗ | ✓ |
| Every night, at home | ✓ | ✓ | ✓ | ✗ |
| Breaks the oil-rebound cycle | ✓ | ✗ feeds it | ✗ | ✓ |
| Cost, year one | $109 once | $180+ | $720+ | $3,900 |
| Cost per night | 41¢ | 49¢ | $1.97 | $10.68 |
Summer Sale
The salon habit costs $3,900 a year. This is $109. Once.
ONE-TIME · NOTHING RECURRING
The Kamiyu Dome84 kneading nodes · Onsen warmth · red light · IPX7
YOU PAY $109
The Scalp Scopesee your own scalp on your phone
✓ FREE
The Japanese Scalp Health Guidedigital, sent after checkout
✓ FREE
1-Year Dome Warrantyit breaks, we replace it
✓ FREE
The Scalp Applicatorputs the shampoo on skin, under the hair
✓ FREE
The Scalp Combhollow teeth that clean the scalp itself
✓ FREE 
Priority Insured Shippingtracked, insured, at the door fast
✓ FREE
Standard Shippingtracked, at the door
pay $5.95
✓ 60-Night Black Shirt Guarantee · ✓ Free U.S. shipping · ✓ Ships within 48 hours
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Answers, before you decide
Everything people ask before they add it to the cart.
Three things no basic massager does, working at once: 84 counter-rotating nodes that knead the way a therapist's hands knead, Onsen warmth that softens hardened buildup so it lifts instead of clinging, and red light at 630 to 680nm delivered against the scalp itself. Then the system around it: the comb, the applicator that puts shampoo on skin instead of hair, and the Scope that lets you watch it work. It is the full $150 head spa sequence, not a vibrating gadget.
Yes. That is the point. Anti-dandruff shampoo only works if it reaches scalp skin, and it usually rinses off in seconds. Lather, then knead it in with Kamiyu. Zinc, ketoconazole, salicylic acid: whatever your shampoo uses, it finally gets contact time.
Flakes, grease by 4pm, the itch, more hair in the drain: they look like four problems but they start in the same place, the buildup at the root. That is the surface Kamiyu clears, whichever mix of the four you have. One honest exception: if you have psoriasis, eczema, open sores, or you are under a dermatologist's care for a scalp condition, check with them first. We would rather lose the sale than pretend otherwise.
The first flush shows you immediately: the rinse water tells the story. Itch and grease usually calm within the first two weeks. Shedding is a slower system, give it the full 60 nights, which is exactly what the guarantee covers.
Three steps, inside the shower you already take. Comb it through dry to open a path. Fill the applicator and press the shampoo onto your scalp, not your hair. Then ten minutes with the dome and rinse. The only new thing is where the shampoo goes.
IPX7. It lives in the shower. Rinse it under the tap when you rinse yourself. It charges by USB-C between sessions.
Yes. The system treats the scalp, not the strands. The shampoo goes on at the root and rinses clean. Nothing in the system strips color.
The device's fingers work at the scalp, under the hair, and the method was built shower-wet. For protective styles, use the applicator along exposed partings and the dome on wash days.
About eight weeks at three washes a week. When it runs out, the refill ships two more bottles, around sixteen weeks, for $39, and only when you order it. Nothing auto-ships and nothing renews. The dome never needs replacing, and the applicator lasts as long as you do.
Because you almost certainly already own one, and it was never the problem. The surface it landed on was. Kamiyu is the tool set that clears that surface. Put your minoxidil, your rosemary oil, your $60 peptide serum on a cleared scalp and it reaches skin instead of buildup. The device even has a cabin you fill with your own.
Run the reset for 60 nights, counted from the day yours arrives. Then wear the black shirt you stopped wearing and look at your shoulders. If you do not love what you see, one email to hello@trykamiyu.com refunds every cent, and we pay the return shipping. No forms. No fights. Less than 1% of our customers have ever asked.
Free U.S. shipping on every order, out of Cheyenne, Wyoming within 48 hours, with tracking the moment it leaves. Returns are the guarantee: 60 nights, full refund, we pay the return label. A real person answers hello@trykamiyu.com inside one business day.
四Verified Reviews
★★★★★ 4.9 average across 1,213 verified reviews · photos are theirs
Claire B.US · 3 reviews
All of it went on my hair. The flakes were never on my hair. They were coming off the scalp, which I had never once washed properly. Kamiyu changed my LIFE. People are giving me compliments on my hair!
Date of experience: July 26, 2026
Priya S.US · 2 reviews
I sat on the edge of the tub and stared at it, because I have washed my hair every other day for thirty years. But night 14 is the part I did not expect: I caught myself checking my part in the elevator mirror. Not for flakes. Just to look.
Date of experience: August 1, 2026
Linda F.US · 1 review
I am 61 and I assumed the flakes were just part of getting older, like everything else. My daughter set this up in my shower and wrote the three steps on a sticky note. Week three: I wore navy to church. I have not worn navy in years.
Date of experience: August 5, 2026
Kayla D.US · 5 reviews
Nobody answered my email until day three. The device itself? Annoyingly good. The itch stopped in week one and my blowouts last two days longer. Ship faster and it is five.
Date of experience: August 6, 2026
The rinse water ran grey the first night. Grey. I sat on the edge of the tub and stared at it, because I have washed my hair every other day for thirty years. That photo is the proof. But night 14 is the part I did not expect: I caught myself checking my part in the elevator mirror. Not for flakes. Just to look.
Priya S. · night 14✓ Verified
My colorist stopped mid-foil, picked up a strand and asked what I switched to. I got to say a Japanese word she had never heard. This photo is day-two hair, zero product, right after school drop-off. Day two used to be bun-and-dry-shampoo day.
Alana G. · night 18✓ Verified
My daughter gets married in October. I ordered this the night the engagement photos came back, because all I could see was the light hitting my scalp through my part. Night 21: my stylist found new baby hairs along the parting and asked what changed. I am wearing my hair down at the wedding.
Rachel M. · night 21✓ Verified
I am 61 and I assumed the flakes were just part of getting older, like everything else. My daughter set this up in my shower and wrote the three steps on a sticky note. Week three: I wore navy to church. I have not worn navy since 2019. That is my whole review and my daughter says it is a good one.
Linda F. · night 24✓ Verified
Three minutes of kneading while my conditioner sits. The rest fits inside the shower I already take. I have a drawer of things I quit: the derma stamp, the rosemary drops, the $5 brush from TikTok. This one lives on the shower shelf, and apparently I am now the person who says “my ritual” out loud. My sister rolled her eyes. Then she borrowed it.
Jenn P. · night 40✓ Verified
Four stars because shipping took nine days and nobody answered my email until day three. The device itself? Annoyingly good. The itch stopped in week one and my blowouts last two days longer. Ship faster and it is five.
Kayla D. · night 22✓ Verified
Feels amazing, but honest note: the first two nights I kept tangling longer strands around the heads until I figured out you part the hair first and keep it moving. The method card actually says that, I just did not read it. Scalp definitely feels cleaner. Roots stay fresh a full day longer.
Sofia R. · night 12✓ Verified
Someone at work asked if I got a gloss treatment. A gloss treatment. I have not gotten one hair compliment in eleven years at that office. It was a Tuesday. I wrote it in my notes app.
Tanya W. · night 27✓ Verified
My sister made me try hers while I was visiting. I ordered mine from her guest bathroom before my hair was even dry. You know within one use. That sounds dramatic. It is not.
Grace L. · night 11✓ Verified
ok so i was not going to review but my mom asked to borrow it when she visited and never gave it back. ordered a second one. thats the review
Meg T. · night 19✓ Verified
A stranger on the train asked what I use in my hair. A stranger. On the train. I heard myself say “it’s a Japanese thing” like a woman who has her life together. My friend took this photo because she did not believe me about the shine.
Claire B. · night 37✓ Verified
Our anniversary dinner. My husband took one picture of me from across the table and sent it to me with three fire emojis. Fourteen years. He has never once photographed my hair. I wore it down and I did not think about it one time all night.
Nadia S. · night 44✓ Verified
I cancelled my standing blowout appointment. Not to save the money, although that is $260 a month back. My own hair does the thing now. My neighbor took this and I made it my new everything photo.
Elise M. · night 52✓ Verified
Run the ritual for 60 nights. Then wear the black shirt you stopped wearing and look at your shoulders. If you do not love what you see, and what you stopped seeing, send it all back. Every cent returned. No forms. No fights. Sixty nights counted from the day yours arrives. One email to hello@trykamiyu.com does it.
Less than 1% of our customers have ever asked.
ADD TO CART · $109 →
For anyone on the fence about the guarantee, I actually tested it. Emailed on night 40 because I wasn't sure the shedding had slowed. They told me to finish the 60 nights and refund me either way if I wanted. I kept it. Drain catch says it's working.