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 whole box and throw the rollers away.
一Watch what your fingers actually do
Shampoo is built to clean hair, and hair is what it cleans. Your fingertips press lather across the top and slide. The skin underneath, where the oil is made and where the buildup hardens around each follicle, never gets touched. Decades of washing, and that surface has still never been cleaned.
The dome puts the same shampoo where your hands cannot reach. Then it warms it, kneads it and runs red light straight at the root.
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Seen In Real Showers
Real customers, real bathrooms, the first nights with the dome. Tap a video for sound.
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 inside two weeks, and the front desk knows it: they book your next visit before you reach the door. 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.
The part nobody explains
Your scalp replaces its surface on a clock. On a flaking scalp that clock runs close to twice as fast, so the cells that become next week’s flakes are already halfway up before you wash today.
Strip the surface on Monday and you have removed what was sitting on top. You have not touched what is on its way. That is why the salon books you back in two weeks, and why every bottle in your cupboard stopped working. Nothing stopped working. The clock kept running.
The first rinse shows you what was sitting up there. Most people watch the water run grey.
The next layer reaches the surface. This is exactly where a one-off treatment quits and where a nightly reset does not.
The itch goes quiet first. Grease slows down, and wash days start stretching.
Shedding is the slow system, so give it the full sixty. Then put on the black shirt and check your shoulders.
A salon visit lasts about a week. A practice beats a clock.
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Kami, hair. Yu, bath. The Japanese practice of washing the scalp itself, not just the hair. Tokyo salons have done it for decades. American salons charge $150 a session for it. Now it runs in your shower.
三Why Kamiyu Exists
My name is Nao Kurihara. I spent twelve years with my hands on other people’s scalps.
Nao Kurihara, founder of Kamiyu · swipe
Not hair. Scalps. In Japan the scalp is treated as skin, and washing skin is not a luxury, so the work is ordinary and constant. TikTok calls the result glass hair and chases it with serums. We never needed the tutorial: the shine was always grown at the scalp.
I photographed almost every client. 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. Grown adults going quiet in the chair. One man asked me to turn the screen off. He still rebooked.
There is one client I still think about. For two years she booked the last appointment of the day, when the salon was quiet. One evening she told me why: she had stopped sitting near the front at her son’s school concerts, because the seats rise behind you, and she knew what the people above her would see. They were never careless. Almost everyone in my chair washed carefully, often twice a day. Nobody had told them that the hair and the skin underneath it are two different surfaces, and only one of them was being washed.
And the treatment worked. Every time. Then they booked again for two weeks out, because the hour never survived the drive home. Same scalp, same chair, same condition, two 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.
Inside the $150 Session
Every session I gave had the same four moves, in the same order. Swipe through what that money buys.
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.
4The Knead
Pressure, warmth and red light, worked into the skin. The step that makes it a treatment. In your box: the Kamiyu Dome.
That is the entire $150 treatment. Every tool above ships in your box, and the chair is your shower. The only new thing is where the shampoo goes.
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We still do not sell you a treatment. Whatever serum you already own goes on after, and for the first time it lands on skin instead of buildup. The bottle in this box is the cleanser that gets it there.
84 silicone nodes on counter-rotating heads, working the way a head spa therapist's hands work: pressure, rotation, at the root, under water.
Gentle heat softens hardened sebum before the nodes touch it. This is the steam step of the salon ritual, built into the dome.
630-680nm delivered at the scalp, not through hair from a helmet across the room. Ten minutes, while you are already in the shower.
| KAMIYU | Dandruff shampoo | Growth serum | $150 head spa | |
|---|---|---|---|---|
| Clears the sebum plug | ✓ | ✗ | ✗ | ✓ |
| Works at the follicle, under water | ✓ | ✗ | ✗ | ✓ |
| Every night, at home | ✓ | ✓ | ✓ | ✗ |
| Breaks the oil-rebound cycle | ✓ | ✗ feeds it | ✗ | ✓ |
| Cost, year one | $109 once | $180+ | $720+ | $3,900 |
| Cost per night | 27¢ | 49¢ | $1.97 | $10.68 |
The cheaper option is the one that actually fixes it. And year two costs nothing: the dome does not run out.
The $150 Lesson
I paid $150 for a head spa in Studio City and I want to be honest: it was incredible. Best my hair has felt in years. On the drive home I called my sister to describe the grey rinse water. Then the salon texted me the rebooking link. Two weeks out. $150. Twenty-six times a year. Forever.
I did the math at a red light on Ventura and felt genuinely stupid. The Kamiyu arrived that Friday. Night 30: my hair looks like I just left Studio City. Except now it looks like that every day. I never rebooked.
My wife bought this and I made fun of it for a week. Then I used it once and now we argue about whose turn it is. I don't know how to describe it except my head feels decompressed. Ordering a second one so we stop fighting.
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
The Scalp Scopesee your own scalp on your phone
✓ FREE 
The Scalp Applicatorputs the shampoo on skin, under the hair
✓ FREE 
Acacia Gua-Sha Combopens a path through the hair, before the water
✓ FREE 
Free Shippingtracked, to your door
✓ FREE 
The Japanese Scalp Health Guidedigital, sent after checkout
✓ FREE
1-Year Dome Warrantyit breaks, we replace it
✓ FREE FREE shipping · tracked, to your door
Your first rinse runs grey tonight. That is the buildup leaving.
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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.
No. The dome works the shampoo you already own into the scalp itself, so nothing about your routine has to change. If you want the exact wash the salon protocol uses, the Tea Tree Scalp Shampoo in the add-ons is built for it, but it is optional.
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 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
Sandra P.US · 2 reviews
I almost filmed it for my group chat. Three weeks in, my part does not itch at 3pm anymore and the little brush I carried in my purse for emergencies stays home. I did not tell anyone what changed. They keep asking anyway.
Date of experience: July 30, 2026
Diane H.US · 1 review
I threw out three dark tops last year because I was tired of checking my shoulders in the car mirror. Week four with this thing: I bought a black cardigan on purpose. At my age you do not expect a shower gadget to win an argument your dermatologist lost.
Date of experience: August 5, 2026
Brianna L.US · 6 reviews
Charge it on the counter, not in the caddy, and you will be fine. Everything else is honestly annoying how well it works. The itch was gone by night six and my blowouts last two days longer. Fix the cable and I will change this.
Date of experience: August 6, 2026
Chris B.US · 3 reviews
I used to clear it twice a week. Week three: I have not thought about it once. My wife says my hairline looks thicker at the front. I did not correct her with the word cleaner. Let her think what she wants, I am keeping the streak.
Date of experience: August 10, 2026
Victor R.US · 1 review
Zoom made me watch myself scratch my head on camera for a year, so I started wearing a cap indoors like that was a solution. Ten minutes a night. The itch went first, then the flakes on my desk. The cap is in a drawer. That is the whole review.
Date of experience: August 13, 2026
I photographed my part every Sunday to prove to my dermatologist it was getting worse. These are three Sundays apart. I cancelled the appointment.
Dana K. · night 23✓ Verified
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
Counted the drain catch this morning out of habit. Then realized I had stopped counting weeks ago. Booked a haircut yesterday because I wanted one, not to hide anything. That is the whole review.
Daniel K. · night 32✓ 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 barber said the word buildup and would not say much more. So I looked it up and ended up here. Ten minutes a night where my phone cannot reach me. Less on the pillow by week two. I checked. Checking is what I do.
Marcus T. · night 16✓ 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 the charging cable in the box is shorter than I would like. The device itself? Annoyingly good. The itch stopped in week one and my blowouts last two days longer. Longer cord and it is five.
Kayla D. · night 22✓ Verified
I am an engineer, so I did not believe the red light part. I looked up the wavelength studies on my phone while my wife was already using it. Fine: the literature is real. But what sold me was dumber than that. I ran the Scope over my crown before and after one week. You can see the difference on the screen. Data wins.
Paul D. · night 9✓ 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 reset 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.