Flakes on the black shirt by lunch. Roots greasy again by 4pm. The itch you scratch in meetings. A little more hair in the drain every year. Four problems, one cause: a layer of hardened oil and dead skin over the follicles that shampoo has never reached. Kamiyu is the first thing that washes it.
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.
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二 WATCH WHAT YOUR FINGERS ACTUALLY DO
Your fingers move the foam. They never move the plug.
Shampoo is built for hair, and hair is what your fingers wash. The skin underneath, where the oil is made and hardens around each follicle, never gets touched. The dome puts the same shampoo where your hands cannot reach, then warms it, kneads it and runs red light at the root.
FIG. 02 — SAME SHAMPOO. SAME SHOWER. ONLY THE DEPTH CHANGES.
SEEN IN REAL SHOWERS
Real showers. Real scalps. Some of them filmed it.
Real customers, real bathrooms, the first nights with the dome. Tap a video for sound.
SWIPE · 4 VIDEOS
三 YOU ARE NOT IMAGINING IT
The flakes are real. The grease is real. The drain is real. And they all start in the same place.
Flakes on the shoulders
Dead skin and hardened oil, lifting off a scalp that was never cleaned under the hair.
Greasy by 4pm
A stripped scalp panics and pumps more oil. The more you wash, the faster it comes back.
The itch
Buildup pressing on the follicle. You scratch it in meetings. Look under the fingernail.
The drain, every morning
Follicles choked at the root grip the hair weakly. It lets go in the shower.
3,900WASHES SINCE YOU WERE FIFTEEN
Three washes a week since you were fifteen is 3,900 washes, and not one of them cleaned your scalp. Four symptoms, one root cause: the sebum plug. Trichologists call it buildup. We call it the plug, because that is what it does.
Strips the surface, misses the plug, and dries the scalp until it doubles its oil in defense. The flakes come back with backup.
Growth serums
Good 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.
Fingernails + plastic brushes
They scratch the surface and inflame the skin. A head spa therapist never scratches. They knead. Pressure, rotation, at the root, under water.
The $150 salon
It genuinely works. Once. Then the plug rebuilds inside two weeks. A salon reset lasts about a week. A nightly practice keeps it. $3,900 a year, if you keep going back.
Every one of these is still in the cupboard. Not one of them ever reached the skin.
髪湯
四 INTRODUCING
Finally, a way to actually wash your scalp.
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.
01
84 kneading nodes
A therapist's fingers, counter-rotating
02
Onsen warmth
Softens the plug first
03
Red light 630–680nm
At the root, under water
04
IPX7 waterproof
Lives in the shower
05
USB-C, cordless
One charge, a week of nights
06
10 minutes a night
Inside the wash you already take
Ten minutes, in the shower you already take. Four moves, same order as the salon.
1. Look
The Scope on your part, your phone as the screen.
2. Comb
Dry, through the hair, so the wash can reach skin.
3. Apply
The wash pressed onto the scalp, not the hair.
4. Knead
Warmth, kneading and red light at the root. Rinse.
THE SECOND HALF
The Dome opens the follicle. The Wash keeps it open.
Regular shampoo is built for hair. It coats the lengths in conditioning film and is off your scalp in seconds. That film is what the plug rebuilds on. The Tea Tree Scalp Wash is built for skin.
茶
Pure tea tree
Australian tea tree oil calms the yeast on every adult scalp. Nothing perfumed on top of it.
涼
Rinses to nothing
No silicones, no polymers, no film. Nothing left for the plug to rebuild on.
无
No harsh chemicals
No sulfates, parabens, dyes or synthetic fragrance. Gentle enough for every night.
肌
Made for skin, not hair
Balanced to the scalp, pressed on with the applicator, worked in by the dome.
REGULAR SHAMPOO
Built for lengths. Leaves a film. The plug is back in two weeks.
TEA TREE SCALP WASH
Built for skin. Rinses clean. The follicle stays open between nights.
ONE BOTTLE A MONTH, IN EVERY PLAN
五 IN THE BOX
Everything Inside Your Scalp Reset Kit
The Kamiyu Dome
84 silicone nodes on counter-rotating heads knead the way a therapist's hands knead. Onsen warmth softens buildup, 630–680nm red light lands where it matters. IPX7.
The Tea Tree Shampoo
The wash the salon protocol uses. Tea tree oil cuts through grease and buildup while the dome presses it into the skin. One bottle per month in every plan.
The Scalp ScopeFREE
A magnifying camera that shows your scalp on your phone. 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.
The Gua-Sha CombFREE
Solid acacia, combed through dry hair before any water. It opens a path so the cleanser can reach the skin itself.
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.
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髪湯 髪湯
KAMIYU · NOUN · JAPANESE
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.
六 BEFORE YOU CHOOSE
Same scalp. Nights apart.
★★★★★ 4.9 out of 5 · 1,213 verified reviews · photos as submitted, no retouching
WEEK 0WEEK 3
DANA K. · COLUMBUS, OH★★★★★
Three Sundays apart. I cancelled the dermatologist.
I photographed my part every Sunday to prove to my dermatologist it was getting worse. Same bathroom, same light.
WEEK 0WEEK 6
SIMONE R. · HOBOKEN, NJ★★★★★
Week 0 to week 6. Same part, same light.
My roots used to be finished by two in the afternoon. It just stopped coming back so fast, and the part stopped showing pink.
WEEK 0WEEK 4
PRIYA S. · SAN JOSE, CA★★★★★
Same drain, same shower, four weeks apart.
I did not change anything else. Not the shampoo, not how often I wash. The catch used to look like the left every morning.
WEEK 6
RACHEL M. · AUSTIN, TX★★★★★
My stylist went quiet and asked what I had switched to.
Six-week appointment. She parted it under her light and asked what I was using. Nothing new, except this.
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
$89 once
$180+
$720+
$3,900
Cost per night
24¢
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.
七 CHOOSE YOUR SCALP RESET
Get Up to 67% Off + 5 Free Gifts
Every plan ships the Dome. You pick how many months of Tea Tree Scalp Wash come with it.
Everything people ask before they add it to the cart.
問
Three things working at once, which is what makes it a treatment and not a wash: 84 counter-rotating nodes that knead the way a therapist kneads, onsen warmth that softens hardened buildup so it lifts instead of smearing, and 630-680nm red light delivered at the scalp itself. That is the $150 session, minus the chair.
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.
The Dome will work whatever shampoo you own into the scalp, so tonight is covered either way. But regular shampoo is built for hair: it coats the lengths and leaves the film that hardens back into the plug. The Tea Tree Scalp Wash is built for the skin, so it keeps the follicle open once the Dome has cleared it. That is why every plan ships with it.
Because you almost certainly already own one, and it was never the problem. The surface it landed on was. 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.
NAO KURIHARA, FOUNDER OF KAMIYU
九 WHY KAMIYU EXISTS
I have twelve years of before pictures and almost no afters.
My name is Nao Kurihara. For twelve years in Japan I washed scalps for a living, six days a week, and scanned every one onto a screen before I started. For most people it was the first time they had ever seen their own scalp. Then I did the work. It worked. And four weeks later they were back in the chair with the same scalp, because the hour never survived the drive home.
Kamiyu is that hour, rebuilt for your shower. The scan is in the box, so this time the after picture is yours.
艶
十 VERIFIED REVIEWS
1,213 verified reviews. Here is what they say.
92%
SAW FEWER FLAKES BY WEEK THREE
89%
HAIR LOOKED VISIBLY GLOSSIER
96%
KEPT THE HABIT PAST NIGHT 60
CLAIRE B. · JUL 29★★★★★
Fifteen years of buying the right shampoo and using it wrong.
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. People are giving me compliments on my hair!
SANDRA P. · AUG 3★★★★★
Washed my hair that morning. The water still ran grey that night.
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.
DIANE H. · AUG 8★★★★★
Sixty-two, and my black cardigan is back.
I threw out three dark tops last year. 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.
BRIANNA L. · AUG 11★★★★★
Four stars because the charging cable is short.
Charge it on the counter, not in the caddy. Everything else is honestly annoying how well it works. The itch was gone by night six and my blowouts last two days longer.
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.
PRIYA S. · NIGHT 1 · ✓ VERIFIED
My roots used to be finished by two in the afternoon. This photo is day three. No dry shampoo, no root powder, nothing.
SIMONE R. · NIGHT 24 · ✓ VERIFIED
Post-workout used to be the worst of it. Hand in my hair at the gym now and nothing under the nails.
ANDRE P. · WEEK 3 · ✓ VERIFIED
60 NIGHTS
The Black Shirt Guarantee
Night 1
The first rinse shows you what was sitting up there. Most people watch the water run grey.
Night 10
The next layer reaches the surface. This is where a one-off treatment quits and a nightly reset does not.
Night 30
The itch goes quiet first. Grease slows down, and wash days start stretching.
Night 60
Shedding is the slow system, so give it the full sixty. Then put on the black shirt and check your shoulders.
Sixty nights, counted from the day yours arrives. Put the black shirt back on. If your shoulders are not clean, send it all back for every cent. No forms. No fights. One email does it. Less than 1% of our customers have ever asked.
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.
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REFERENCES
Sebaceous gland density is highest on the scalp and face, at roughly 400 to 900 glands per cm². ScienceDirect Topics; PMC6068117.
Malassezia lacks the fatty acid synthase gene and harvests fatty acids from scalp sebum, leaving oleic acid behind. PNAS 2007; J Am Acad Dermatol 2004.
Epidermal turnover on a dandruff scalp runs at roughly 13 to 15 days against about 28 for normal skin. Int J Cosmet Sci 2012, PMC3494381; Medscape.
Red light in the 650 to 660nm range increased hair density against sham in randomised controlled trials. PMC7373546.
Follicular miniaturisation is driven by perifollicular inflammation and fibrosis. J Am Acad Dermatol 2021; Clin Cosmet Investig Dermatol.
Antifungal shampoo is directed to be massaged into scalp skin and left in contact for three to five minutes. Mayo Clinic.
The Japanese Scalp Reset · from $8960-NIGHT GUARANTEE · FREE SHIPPING
