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髪を通して世界探索をする、とある美容師の研究日誌 — Field Notes from a Hairdresser's Lab

FILED BY MASASHITT

現役美容師・29年目。サンフランシスコを拠点にヘアサイエンスとエフィラージュカットを探求しながらHair Caffe Labを運営。「科学と非科学、ハイクラスとストリート」—その交差点に挑み美容に留まらない知見と私見をマイペースに綴ります。/29-year hairdresser based in San Francisco. Exploring hair science and the Effilage technique while developing Hair Caffe Lab. Navigating the intersection of science and intuition, high-end and street — writing it all down at my own pace. About this lab →

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現在の場所:ホーム / アーカイブEnglish Post

English Post

LAB NOTES #3 | The 0.01% World — My Battle with Argan Oil

2026-04-23 By masashitt カテゴリLAB NOTES関連タグ:English Post

→ この記事の日本語版はこちら / Read in Japanese


I still remember the first time I seriously put 100% argan oil on my hair.

I’ll be honest. …I burst out laughing.

“Wait — is this it? This has to be a joke, right?”

The stickiness, the weight, a strangely clumsy heaviness. My hairdresser instincts — after years of handling dozens of hair oils — gave their verdict the instant it touched my hair: “Nope. Not usable.” Great on my skin, though. I’ll give it that.

The Previous Chapter, and Today’s Opponent

In my last post, I wrote about how I got stuck before the real work even began — the unexpected “battle with the base material.” Once the base was finally settled and I was thinking, OK, now the real work begins, what actually waited for me was the main ingredient of No.115 / No.215: the battle with argan oil.

From what I’ve seen, argan oil–based haircare products only really flooded the professional industry over the last ten years or so. But today, even products that don’t put argan oil front and center often contain it — you just have to read the ingredient list. The professional line, especially.

For the Record — The Benefits

In the haircare context, argan oil’s benefits boil down to three things:

  • Rich in Vitamin E and polyphenols — protects the hair surface from oxidation, preserves shine
  • A good balance of oleic and linoleic acids — penetrates into the hair’s interior, lends suppleness
  • Relatively light molecular weight — doesn’t weigh the hair down; blends naturally

…there you have it. The spec sheet.

But honestly, none of that ever mattered much to me.

The Real Magic Lives in the Senses

What I actually fell in love with was the change — what happens when you apply it on hair 【at the right concentration】.

It’s hard to put into words. It’s purely visual and tactile.

If I had to try: an elegant shine, moist but not heavy, an unprecedented smoothness. …No. That doesn’t capture it at all. (laughs)

It’s spectacular. I love it.

Concentration is Magic

That said — and I’ll say it again — 100% argan oil is useless on hair as-is.

What makes developing haircare products both punishing and endlessly fascinating is right here:

✨ Concentration is magic.
Concentration is everything. Control concentration, and you control everything.

…you find yourself wanting to invent little aphorisms about it. (laughs)

That’s how much raw materials can transform with concentration. There is one thin, almost invisible point — a single sweet spot — where you lose your mind to how good it is. I’m not exaggerating!!!

To put it plainly for non-professionals: a 0.01% difference in the total concentration is something we professional hairdressers can clearly feel in the result.

A Two-Year Record

It took nearly two years to find that point.

And what made it harder: at the testing stage, you can’t mass-produce.

For a leave-in treatment mist like No.115 / No.215, the amount I could make per test batch was about 50g. Dialing a 0.01% adjustment inside that volume puts kitchen scales out of the question. I ended up investing in a research-grade precision balance (accurate to 0.001g).

…I still remember that particular night.

I’d stopped counting, but it was probably somewhere around the 80th test batch. Closing the salon, past 10pm, I’d try the newest batch on my wife’s hair. Every one of those moments was where hope and despair traded places.

That night, the moment I started combing — my hand stopped.

…there it is, I thought.

“A sweet spot where you lose your mind” turned out to be literal.

Even so, I kept tweaking for another full year, convinced there had to be something better still. In the end, reaching a “more or less” satisfying concentration zone took one year. From there — mixing in the other ingredients — another year to really finish it.

Big Makers vs. Developer-as-Tester

After two years, something struck me.

Normally, at big manufacturers, the product developer and the product tester are two different people. On the surface, that looks like proper division of labor.

But once you step into the world of 0.01%, people inevitably split into “those who get it” and “those who don’t.” And discussion between the two sides quickly drifts into territory where it’s hard to respect the other’s senses. That part, anyone can imagine.

The flip side: when you’re in a small development environment where the developer and the tester are the same person, your own fingertip sensation becomes the final judge.

You can refine until you’re actually satisfied. And even after release, you can keep fine-tuning while working with the product on real clients. …isn’t that, for consumers, a rather big reason to root for small businesses?

In Closing

How far are you willing to go into the madness of 0.01%?

Into the territory that the big manufacturers will not enter — or, more accurately, structurally cannot. Trusting nothing but your own hands and senses, running tens, hundreds of batches. There is a thin, thin single point you can only reach that way.

That, I think, is the real difference between a mass-produced “good product” and an Artifact shaped by a single hairdresser’s own eyes and hands. …Isn’t it?

A side note: the name “No.115” actually comes from the version number of the batch that finally hit the concentration I’d been chasing.


→ この記事の日本語版はこちら / Read in Japanese

カテゴリLAB NOTES 関連タグ:English Post

LAB NOTES #2 | The Tiny Differences That Drive Me Crazy — A Story About Cosmetic Raw Materials

2026-04-17 By masashitt カテゴリLAB NOTES関連タグ:English Post


→ この記事の日本語版はこちら / Read in Japanese


In the last piece, I wrote about the despair that pushed me to start making my own product.

Today, I want to pick up the story from there — the winding, mostly chronological record of how Leave-In Treatment Mist No.115 & No.215 actually came into being.

The Concept Was Clear Long Before the Ingredients Arrived

Honestly, the concept for this product was locked in long before I sourced a single raw material.

The non-negotiables, laid out plainly, looked like this:

  • The base must contain zero water
  • You must be able to feel the benefits of argan oil
  • Keep the formulation as simple as possible
  • Above all, never heavy
  • After application, each strand should stay crisp, dry-feeling, and fully independent from the next
  • The shine should not be oily shine — it should look like the natural gloss of undamaged, healthy children’s hair
  • It must prevent static

Of all these, today I want to zoom in on the first one — no water in the base — and the unexpected detour I took while sourcing that one ingredient.

Why I Was So Stubborn About “No Water”

This product had to be effective, specifically, as a tool for high-heat styling.

The reason is simple. Around 90% of the stylists at our salon — myself included — work with dry cutting techniques. That means blow-drying and high-heat flat irons come into the equation constantly during the cut.

And when the hair still holds too much moisture at the moment the iron touches it, that moisture turns into steam. That steam is the enemy. Proteins denature under heat-plus-moisture, and the texture of the hair drops visibly — you can feel the quality collapse under your hands.

In salon work, there are countless moments where you pick up an already-dry head of hair and reach straight for the blow dryer or iron. To protect the hair and lift both its texture and its workability in those moments, a product like this isn’t a luxury — it’s indispensable. And to prevent that steam from forming at all, a waterless base was, for me, non-negotiable.

The Base Was Already Decided (Or So I Thought)

So, what do you use instead of water?

I already had that answer, too. An oil widely used in cosmetics — foundations and the like — with a very strong safety profile. A liquid that spreads more thinly than water, with surface tension even lower than water’s.

…Forgive me for not naming the specific ingredient here. It sits too close to the core of the formulation.

I’d worked with this material before, back in Japan, so I knew its feel in my hands. I sourced a small quantity through that same route and brought it with me to the U.S. as carry-on. That was my starting material for prototyping.

At the same time, I placed an order with a U.S. supplier for the same ingredient — same INCI name, same spec. It arrived quickly.

Same name. Same standard. The story should have ended there.

The Closest Word Is Vertigo

I tried the U.S.-sourced material, and for a split second, I got dizzy.

“Wait… this isn’t the same…!!??”

The INCI name was unmistakably identical. It’s a completely standard cosmetic ingredient, widely circulated in Japan too. But the finish was different. My hands could feel it.

How was it different? It’s genuinely hard to put into words, but let me try.

A base material, in theory, should leave “no benefit of its own” behind. That’s the ideal. But the version I’d used in Japan left behind something — a faint, never-excessive, perfectly calibrated trace of moisture on the dried hair.

The U.S.-sourced one — and, as it turned out, almost every one I tested from other U.S. suppliers afterward — left nothing. As if the ingredient had simply evaporated alongside the water, leaving the hair as if nothing had ever been applied.

…Not good.

No — this was a bad feeling. A very bad feeling.

The Detour I Didn’t See Coming

From there began the grind: ordering small quantities of the exact same ingredient from a handful of different suppliers and testing every single one.

This phase — choosing the base — was supposed to take a moment. That was the plan.

It took time. It took money. Bottle by bottle, I checked the feel and the finish, took notes, and placed the next order. Quiet, repetitive work with no visible end in sight. Honestly, there were a few moments along the way where a weaker voice in my head said, “Couldn’t you just use the batch you brought from Japan and be done with it?”

But the whole premise of making and selling this in the U.S. falls apart without a supply chain I can keep running from inside the U.S. Cutting that corner would have quietly undermined the product’s identity.

I kept telling myself that. And I kept testing.

And, Finally — There It Was

After several suppliers, I finally hit one that made me go, “This is it.”

I was relieved. Genuinely, deeply relieved.

But at the same time, something cold ran down my spine.

Even when the ingredient name is 100% identical, what’s actually inside the bottle differs subtly from one supplier to another.

Grade. Purification level. The profile of trace components. Lot-to-lot variation. The kind of thing you’d find buried in a footnote of a cosmetic raw-materials catalog.

But when your own hands tell you, “the INCI is the same and yet the finish is not,” that footnote stops being a footnote. It becomes the whole story.

I’m the One Putting Myself in This Spot

Honestly, this is a level of difference that most people would never detect.

But for better or worse, I’ve spent far too many years with my hands in hair. Every single day, dozens of heads. Drying them, ironing them, finishing them. That accumulation has left me with hands that can’t not notice the smallest shifts in finish.

I’m the one putting myself in this spot.

That, I think, might be the exact phrase for it.

Even something as simple as choosing a base turned into an episode like this. Before I started, I never imagined a single raw material could cost me this much sleep.

And only from here did I finally get to the part I’d actually been looking forward to — layering in the ingredients I actually wanted to do the work, on top of that base.

Next time, I’ll write about the second round of headaches — this time, about my relationship with argan oil itself.


→ この記事の日本語版はこちら / Read in Japanese


→ Next in the series: LAB NOTES #3 | The 0.01% World — My Battle with Argan Oil

カテゴリLAB NOTES 関連タグ:English Post

LAB NOTES #1 | Despair Was the Turning Point — Why a Hairdresser Made His Own Hair Product

2026-04-16 By masashitt カテゴリLAB NOTES関連タグ:English Post


→ この記事の日本語版はこちら / Read in Japanese


Ever since I moved to the United States, I’ve been searching for one thing.

A leave-in treatment — what you might call a detangling mist. The kind that smooths the comb through, gives hair just enough slip, cuts static. Not glamorous. Not exciting. But for me, it was an essential tool. Especially here in San Francisco, where every client who sits in my chair brings a completely different hair type, texture, and care routine. Something that makes any hair easier to work with — that’s not a luxury. That’s a necessity. Particularly for someone like me, who cuts dry.

Back in Japan, I had a product I loved. An argan oil–based spray with a fine mist and a light touch. Perfect weight, perfect control. I used it on every single client, every single day.

There was just one fatal problem.

It was an aerosol.

You can’t bring aerosols on a plane. Which meant I couldn’t bring it to America. Which meant I had to find a replacement.


Not a “Product” — a Tool

“Argan oil is the key ingredient. The U.S. market is enormous. There must be something.”

That’s what I told myself.

I was wrong.

The American hair oil market is massive, and argan-based products are everywhere. I bought one after another. Tested dozens. Threw most of them away before they were half empty.

The problem was always the same. Nearly every product on the shelf is designed to impress the consumer — to deliver instant impact, a dramatic before-and-after moment. That means heavy texture. You apply it, the hair shines, there’s an obvious “wow.” But it interferes with the cut. It weighs down the design. It kills volume. Drugstore products in Japan have the same issue.

That’s not what I needed.

What I needed was something subtle. Something that works with every hair type and never fights the style — especially volume. A quiet sheen, not a glossy coat. Moisture without weight.

Something that supports the hairdresser’s work from behind the scenes. Not a “product” in the consumer sense. A tool. The kind of thing that should always be within arm’s reach on a professional’s station — invisible, reliable, and precise.

I couldn’t find it anywhere.


Then one day, I did.

I won’t name the brand, but I finally found something close to what I’d been looking for. Light, refined, and it stayed out of the way. I was so relieved that I started ordering it twelve bottles at a time.

…And then it was gone.

One day, with no warning, the company reformulated the product. Same packaging, completely different formula. The lightness I relied on had vanished. It felt like every other product on the market — heavy and indistinct.

I stood there holding a bottle from my stockpile, and it hit me.

Back to square one.

The thought of starting that whole testing process over again — spending months buying products, trying them, being disappointed, throwing them out — was genuinely devastating.


Despair Was the Turning Point

But that despair was exactly the turning point.

For the first time in my life, a thought crossed my mind: What if I made it myself?

I’d never considered that before. Not once. Products are something you buy. Manufacturers make them. A hairdresser’s job is to cut hair, not to formulate cosmetics. That’s what I’d always believed.

But the thing I depended on had disappeared. Nothing on the market could replace it. And I absolutely, truly did not want to go through that cycle of buying and discarding again. The money, the time, the disappointment — no. So maybe… I should just make it? That might actually be faster? But it can’t be that simple, can it? Then again, I really don’t want to keep throwing money at products that don’t work…

I went back and forth with myself for a while.

Then I started researching. And what I found genuinely surprised me.

In the United States, a remarkable number of cosmetic-grade raw materials are available for individual purchase. I had no idea. In Japan, this is essentially impossible. Regulations are strict, and professional-grade ingredients are almost entirely gated from individual consumers. That’s true not just for cosmetics — in my experience, Japan makes it quite difficult for individuals to source specialized materials of any kind.

But here? The infrastructure exists. The raw materials are accessible. The information is out there. If you’re willing to do the work — wait. Could I actually… do this?

That was the beginning. In a sense, it was also the beginning of a long, difficult road. I didn’t know yet what was coming. All I had was a fire in my chest and a very clear picture of what I wanted to create.

A product that surpasses everything I’d ever tested. My ideal texture, my ideal finish. It’s hard to put into words, but my hands know. After testing dozens upon dozens of products, my fingertips know exactly what “right” feels like.

And as a side effect of all that testing, I already had a rough sense of which raw ingredients produced the qualities I was after.

I ordered the materials immediately.

And a second kind of hell began.

The most enjoyable hell I’ve ever been through — though “easy” is not a word I’d use.


Leave-In Treatment Mist No.115 & No.215

…That’s how Leave-In Treatment Mist No.115 came to exist.

A leave-in treatment mist I made for my own daily salon work — designed to be used on every client. Born from despair with what the market offered. A hairdresser’s first self-made formulation.

The rest of the story — the trial and error of formulation, the endless testing, and how No.115 and No.215 finally came to be — I’ll save for the next piece.

→ Next in the series: The Tiny Differences That Drive Me Crazy — A Story About Cosmetic Raw Materials

A hairdresser making his own tool. It might sound like a dramatic claim.

But when it’s something you reach for every single day, you don’t want it changed on someone else’s terms. You want to trust your own senses completely and shape it with your own hands.

For me, at least, it was the most natural next step I could have taken.


→ この記事の日本語版はこちら / Read in Japanese


カテゴリLAB NOTES 関連タグ:English Post

HAIR WORKS NOTES #3 | Haircut as Sculpture — New York Dry Cutting and the Street Where Two Schools Met

2026-03-23 By masashitt カテゴリHAIR WORKS NOTES関連タグ:English Post


→ この記事の日本語版はこちら / Read in Japanese


In the last piece, I wrote about Paris. Effilage. The art of the invisible cut. The French school’s way of following the hair’s natural movement rather than imposing a form upon it.

Today, we cross the Atlantic.

The place is New York. The era, the 1970s through the 1980s. There, too, was a hairdresser who refused to cut wet hair — arriving at dry cutting by an entirely different route, through an entirely different philosophy, than anything happening in Paris.

His name was John Sahag.


The Hairdresser as Sculptor

John Sahag (1952–2005). Born Sahag Jamgotchian to Armenian parents in Beirut, Lebanon. He began sweeping floors in a salon as a young child, and later emigrated to Australia.

At eighteen, he went to Paris. There he met Bernard Mérillat, a prominent salon owner, and signed a six-year contract. At that same point — at eighteen — his first editorial work appeared in Italian Vogue.

Over the next twelve years, moving between Paris and New York, he developed and refined his dry-cutting technique. In 1985, he opened the John Sahag Workshop on Madison Avenue in New York City.

Brooke Shields cut the opening ribbon. The New York Times called him “the rock star of his industry.” And yet, Tracy Ullman and Gwyneth Paltrow sat in the same waiting room as someone who had come in from Queens. The last client of the day was always handed a glass of champagne.


Why Cut Dry?

The core of Sahag’s philosophy can be stated in one line.

“Wet hair is lying to you.”

When hair is soaked, it bundles together and compresses flat. Its natural growth pattern, curl pattern, weight, movement — all of it is hidden. To cut in that state, Sahag believed, was to draft a blueprint on top of a lie.

Cut dry, and everything is visible as it actually is: curl pattern, volume, growth direction, natural movement. “What you see is what you get.”

A colleague described his approach as “not paint by numbers — sketching a haircut freehand.”


The Technique — Two Hours of Sculpture

Sahag’s process went like this.

Shampoo first, then blow-dry completely. Then divide into small sections — units that follow the hair’s natural “grain.” Each section is straightened with an iron to reveal the hair’s “true state.” Then: vertical tapering with the scissors. No horizontal blunt cutting across the top. Always following the hair’s natural flow.

This is repeated for every single subsection.

One cut takes approximately two hours. Sometimes more. The work is as precise as a sculptor removing material from stone.

The result has distinctive qualities. Because every subsection is individually calculated and tapered, the strands interlock naturally and produce a weightless, gravity-defying movement. And the durability is remarkable — the shape holds for three to six months without a salon visit. No styling required. Every day, the hair falls back into its correct position on its own. (Or so it was said. In practice… a slight exaggeration, perhaps — but the difference compared to a conventional cut is real, and it shows.)

The names attached to his most recognized work are familiar ones. Demi Moore (the boyish crop in Ghost, 1990). Gwyneth Paltrow (the cropped style in Sliding Doors, 1998). Brad Pitt. Mick Jagger. Work photographed by Helmut Newton, Richard Avedon, and Irving Penn.


Paris and New York — An Unexpected Connection

Here I want to note something important, linking back to the previous article.

Bernard Mérillat — the salon owner Sahag met in Paris at eighteen — worked with both L’Oréal and Maniatis. And Sahag himself, later in his career, freelanced for Maniatis collections in New York, Paris, and Milan.

Which means: Maniatis was a place where both effilage and the New York dry-cut school had simultaneous connections. Two distinct techniques, two distinct lineages — both passing through the same house at roughly the same moment.

In the same-era Paris, the two approaches had brushed against each other without fully meeting.


The Bridge to Japan — Eiji Yamane

After Sahag died in 2005 at fifty-three, the technique lived on. The central figure in bringing it to Japan was Eiji Yamane.

Born in Fukuoka, Japan, Yamane apprenticed for four-and-a-half years under celebrated Japanese stylist Michiko Masui, then moved to America without speaking English. He trained for four years under Sam Kopper before being introduced to John Sahag.

Sahag recognized his ability immediately and brought him into the Workshop. His clientele came to include Catherine Zeta-Jones, Sarah Jessica Parker, and Yoko Ono.

And then he returned to Japan, repeatedly, for over twelve years of continuous seminars across the country. Through his educational organization WORKS NYDC (New York Dry Cut), salons practicing New York dry cutting took root in Tokyo, Yokohama, Fukui, Fukuoka, and elsewhere. In Japan, it has established itself as a premium service — at price points ranging from roughly ¥7,000 to ¥40,000 or more per cut.


The Same Dry Cut, Different Philosophies

Before closing, it’s worth pausing to compare the two dry-cut approaches side by side.

Maniatis and Sahag both place dry hair at the center of their work — but their approaches are distinct.

Maniatis: working as closely as possible with the hair’s natural flow and movement — treating the material as it is — then dry resculpting. Extremely fine sections, cut with the tip of the scissors. Client standing, to read the full body.

Sahag: entirely dry, start to finish. Curling iron to reveal each section’s true state, then vertical tapering.

The former is following the material. The latter is liberating the material’s truth. The philosophical starting points are similar, but the technical forms they arrived at are different things.

And both — from fundamentally opposite directions — begin where Sassoon ends. The blueprint comes last, or not at all.


And Now — What Is Happening in San Francisco

When I began writing this series, there was one thing I wanted to make clear.

In the twentieth century, two distinct dry-cut techniques emerged in two different cities, through two different philosophies. Today, the direct inheritors of both lineages work side by side in the same salon in San Francisco.

The French lineage: Maniatis Paris → buyout, founding of agence21 (KENZO) → agence21 Japan academy → studied there (first cohort), emigrated to the US

The New York lineage: John Sahag → Eiji Yamane → Michiaki (owner-stylist, Hair Caffe)

Michiaki inherited New York dry cutting directly from Eiji Yamane. And now, in the same salon — Hair Caffe, San Francisco — the two of us practice these two techniques in a single space.


Why I Wrote This Series

Most hairdressers believe that the technique they know is the whole of cutting. I was one of them. And that’s understandable — even now, in an age of near-total internet access, the information simply doesn’t exist. It took real effort to piece together the research behind this series. But this lineage is too important to hairdressing history to leave scattered and unseen. It deserves to be preserved somewhere visible.

The geometry Sassoon built in London. The effilage that deepened in Paris. The dry cutting Sahag developed in New York. Each was born in the same twentieth century, each arrived at a completely different answer to the same question: how do you leave hair in its best possible state? Each one the result of someone engaging with that question more seriously than anyone else — struggling with it, living it — and arriving somewhere different.

This isn’t a story about which one is right. All of them are real. All of them are deep.

But no matter how high your ambitions, if you don’t know something exists, you can’t choose it.

The intersection of two historically significant dry-cut lineages — that intersection exists right now in San Francisco, at Hair Caffe. And what Michiaki and I are doing, working with these two techniques under one roof, is something still in motion. The new form is maturing, here, right now. That is what is happening as this series closes.

Every technique is still evolving, right now, as you read this.

And here’s what I want anyone reading this to understand. I believe the hairdressing industry is heading toward a sharp divide. The spread of AI and advances in technology mean that automation and robotics cannot be ruled out in our field. If that happens, the techniques that can’t be replicated by data, that no one else can imitate — the ones that are genuinely exceptional — will only grow in value and demand. For hairdressers who have nothing to distinguish themselves beyond average technique, I predict the road ahead will be brutal. Especially in Japan, where competition is already fierce.

If this article found you by accident — and it helps you build a brighter career, a better future, by your own hand — that would make me happier than I can say.


“Three Schools of Haircutting” — Complete
→ #1 Geometry and Liberation — How Vidal Sassoon Changed the World with a Pair of Scissors
→ #2 The Art of the Invisible Cut — Effilage and the French School of Haircutting
→ #3 Haircut as Sculpture — New York Dry Cutting and the Street Where Two Schools Met(本稿)


Note: If you are mentioned in this article and wish to request any corrections or removal, please get in touch.


→ 日本語版はこちら

カテゴリHAIR WORKS NOTES 関連タグ:English Post

HAIR WORKS NOTES #2 | The Art of the Invisible Cut — Effilage and the French School of Haircutting

2026-03-23 By masashitt カテゴリHAIR WORKS NOTES関連タグ:English Post


→ この記事の日本語版はこちら / Read in Japanese


In the last piece, I wrote about Sassoon. Blueprint first. Establish the perimeter, build with geometric precision, finish with wash-and-wear. An architect’s approach. Maximum tension on wet hair to produce a perfect line.

And I wrote this:

“Within the same twentieth century, another pole existed. Approaches that begin not with a blueprint, but with the material itself — that try to read what the hair is before deciding what to do with it.”

That other pole is what I want to talk about today.

The place is Paris. The era, the 1970s.


What the French Hairdressers Were Looking At

French aesthetic thinking started from a fundamentally different premise than Sassoon’s.

If the British School says “make the material conform to the form,” the French School says “follow the growth pattern and the movement.” One sentence, and it explains everything.

There was a man named Jean-Marc Maniatis. Born in 1942. He began his career while still a teenager as a studio hairdresser for ELLE and Marie Claire, and in 1970 opened his own salon in Paris’s 16th arrondissement.

He said this:

“I don’t teach my apprentices hairstyling. I teach them to see — apprendre à regarder.”

This single line goes to the heart of the French school’s philosophy. Look first. Read first. The design comes later — or sometimes never fully resolves until the very end.

His approach is called top-down. He treated the head as a three-dimensional sculptural object, observing the skull structure, facial features, hair density, and natural growth patterns directly as he cut. Like a painter facing a canvas, he worked from the top down, layering “like roof tiles,” with the perimeter line determined last.

And Maniatis often cut with his clients standing up. Not to see the head alone, but to read the whole body — its proportions, its structure, its posture.


What Effilage Is — The Technique of the Invisible Layer

There is a technique that embodies this philosophy. It’s called effilage.

The word comes from the French effiler — to thin, to taper. In English-speaking contexts it’s often described as slithering or slide-cutting.

In one line: you slide the half-open scissors along the length of a section of hair. That’s all.

But the effect runs deeper than it looks.

Where blunt cutting creates clear cut ends and weight lines, effilage creates invisible layers. It reduces bulk naturally without significantly changing the overall length. The ends taper like the tip of a brush. The hair blends into itself, and a seamless, fluid movement is born.

The result looks like: “this is just how it was.” Like nothing was done.

The cut is invisible.

Jean-Louis David took this a step further in 1970, combining effilage with a systematic graduated layer structure — the dégradé — and establishing the modern idea of “cutting to create movement.” The aesthetic of hair in dynamic motion, hair that seems alive in the wind — the work he produced alongside Helmut Newton came from here.

Jacques Dessange refined this further still, crystallizing it into a concept he called coiffé-décoiffé — literally, “styled and unstyled.” Technically, it combines a radial taper from the crown with a square base, designed so that the moment the hair falls out of perfect arrangement, something like vitality enters it.

“A cut only comes alive when a woman moves her head. The hair must be ready to follow.”


The Moment I Saw It

What follows is personal.

A few years into my career as a hairdresser, I encountered effilage for the first time. Encountered it — or rather, watched it happen in front of me.

The only word I had was: shock.

Something completely different from everything I’d learned was happening. After the cut, no “cut shape” remained. In the finished result, there was no evidence of where the scissors had been. And yet the hair moved with a lightness that was almost unbelievable. It looked untouched. And it was arranged.

If I’m honest, my first reaction was just: what is happening here? Technical understanding came later. The sensory impact arrived first.


The Buyout, and the Birth of agence21

To explain how effilage eventually found its way to me, I have to start with a specific event.

2009. A group called Provalliance acquired the Maniatis salon network. Provalliance. At the time, Maniatis operated four salons in France, and approximately twenty salons in Japan.

In the wake of the acquisition, a Japanese hairdresser who had held a leading position at the Paris Maniatis salon left.

That person was KENZO.

KENZO went on to establish a creative collective called agence21 (アジャンス・ヴァン・テ・アン). And he launched an academy to teach effilage — a technique that had been kept inside Maniatis — to hairdressers outside the salon. In simple words, that doesn’t sound like much. But it was extraordinary. That technique — those magical, near-incomprehensible scissors movements — was being released into the world.

In the early days, there were rights-related issues, and the term “effilage cut” couldn’t be used directly for a time. During that period, the academy operated under the name coupe 3D. Those restrictions have since been resolved, and the name effilage is now freely used. When I started training, the academy was still operating under the coupe 3D name.


My Teachers

KENZO brought the academy to Japan as well.

I was in the first cohort of students — I received cut training directly from senior agence21 staff.

There is another person I can’t leave out.

KEIGO. When Maniatis expanded from Paris to Japan, KEIGO was one of the core stylists sent over. It’s said that within the Japanese Maniatis operation, KEIGO was effectively the only person who could perform effilage with full accuracy. I received cut training directly from him as well.

Learning from both of them was a turning point in my career as a hairdresser.

I should add: beyond KENZO and KEIGO, there are hairdressers in Japan who have their own connections to agence21 and carry on the effilage lineage. The transmission of this technique isn’t limited to two people.


Where Effilage Can Still Be Learned — Places That Exist in Japan Right Now

agence21 is still active.

In Japan it operates under the name VINGT ET UN (ヴァン・テ・ユン).

・agence21 Japan (VINGT ET UN): https://www.agence21.info/

Also in the same building — 1-7-3 Iidabashi, Chiyoda-ku — is chardon.

・chardon: https://www.chardon21.net/

KENZO’s salon VINGT ET UN is at the same address.

There’s one more person worth mentioning.

Yotsumoto, owner of real clothes in Shimokitazawa, Tokyo. He received training directly from KENZO in Paris — which, when you consider how few people today are in a position to have done that, means something.

・real clothes (Shimokitazawa): https://www.0334662608.com/

There is also Brut in Seijo, Tokyo — another salon connected to KEIGO.

・Brut (Seijo): https://www.brut21.com/

These salons are places where a living transmission is still happening. If you’re in Japan, effilage can still be learned in its living form. Whether that will still be true in ten years — honestly, I don’t know. The time the masters have to actively pass this on is finite. I want to say that as directly as I can.


Sassoon and the French School — Two Definitions of Reproducibility

The French School also pursues reproducibility. But what that word means is entirely different from Sassoon’s.

Sassoon’s reproducibility: reproduce the geometric precision exactly, every time. The French School’s reproducibility: return naturally, every day, to where the hair wants to fall according to its own movement and gravity.

The former is the reproduction of a design. The latter is the release of the material’s potential — a return to where it naturally lands.

“If a hairstyle has a name, it’s probably not the right one for you.” — Jean-Marc Maniatis

A cut without a name. A form that belongs only to this one person.


“Three Schools of Haircutting”
→ #1 Geometry and Liberation — How Vidal Sassoon Changed the World with a Pair of Scissors
→ #2 The Art of the Invisible Cut — Effilage and the French School of Haircutting(本稿)
→ #3 Haircut as Sculpture — New York Dry Cutting and the Street Where Two Schools Met


Note: If you are mentioned in this article and wish to request any corrections or removal, please get in touch.


→ 日本語版はこちら

カテゴリHAIR WORKS NOTES 関連タグ:English Post

HAIR WORKS NOTES #1 | Geometry and Liberation — How Vidal Sassoon Changed the World with a Pair of Scissors

2026-03-23 By masashitt カテゴリHAIR WORKS NOTES関連タグ:English Post


→ この記事の日本語版はこちら / Read in Japanese


London, 1950s. For women who visited the salon, the week had a rhythm.

Shampoo, roller set, sit under a massive dome dryer for over an hour, seal with lacquer. Next week, repeat. An endless cycle. A hairstyle was something you maintained. A hairdresser was someone who held a shape in place.

Then someone came along and changed what that could mean.

Vidal Sassoon (1928–2012). Born in London’s East End, raised in an orphanage, and apprenticed to a hairdresser at fourteen.


Sassoon’s Reference Point Was Architecture

When Sassoon launched his revolution, the ideas behind it came from an unexpected source: the philosophy of design and architecture.

Bauhaus. A school that existed in Germany from 1919 to 1933, it left an outsized mark on how the twentieth century thought about design and building. Its core tenet: strip away the unnecessary, and fuse function with geometric form. Sassoon took that philosophy and applied it directly to the human head.

His core thesis could be stated in a single line.

“Shape before Style.”

If the cut is right, you don’t need rollers or hairspray. The hair falls into its correct form on its own. Wash it, dry it. Done.

Conversely — and this was a fairly direct indictment of the beauty industry at the time — all the setting and spraying to “maintain” a style was only necessary because the cut itself was never properly designed to begin with.


1963: The Five-Point Cut

The most dramatic proof of that thesis was the Five-Point Cut, created in 1963 on model Grace Coddington. Five sharp V-lines, structured to emphasize the eyes, cheekbones, and jawline. Sassoon himself described it as “the most pure and classical form of geometric design.”

Coddington later recalled: “Nothing has ever beaten that cut. And it freed everybody. They could just let it dry naturally and shake their heads.”

Break it down technically, and Sassoon’s approach had a clear architectural skeleton.

Bottom-up construction — establish the perimeter line first, then work inward, calibrating weight as you go. The finished form is mapped before the first cut is made. Wet hair under tension maximizes geometric precision. Blunt cutting creates sharp lines and distinct edges. The ABC classification system he developed — A = one-length, B = graduation, C = layering — gave the industry a shared vocabulary. Precise sectioning and cross-checking brought the margin of error close to zero.

The blueprint comes first. Then you build it on a human head. It’s an architect’s way of thinking.


“Wash and Wear” as Social Statement

The Five-Point Cut wasn’t only a technical achievement.

It freed women from the weekly ritual of being confined under a dome dryer. “Hair that works after washing and drying” — the wash-and-wear concept resonated with the second-wave feminism already moving through the 1960s. This appeared in the same decade, the same city, as Mary Quant’s miniskirt. That was probably not a coincidence. Quant said of Sassoon: “He freed us, just as much as the pill and the mini.”

This was the moment a haircut became a symbol of an era.


Watching Sassoon’s Legacy from North America

I’ve been working as a hairdresser in San Francisco for over eight years now.

Something becomes clear in this environment. Here in California, just as in Japan, the overwhelming majority of stylists were trained on a Sassoon-based curriculum. Bottom-up sectioning, wet precision line-building — this framework still functions as the industry standard. Most cosmetology school curricula, for better or worse, are built on the architecture Sassoon designed.

There’s nothing wrong with that. Geometric precision gives a cut strength and reproducibility.

And this — this is still what makes me believe Sassoon’s contribution was one of the great inventions in the history of the craft — above all else, it’s teachable. Easy to teach, easy to learn. The impact that single quality has had on the hairdressing industry is enormous. Enormous.

But after twenty-nine years in this trade, what I keep coming back to is that this “blueprint-first” way of thinking is one pole of the full spectrum of haircut philosophy. Within the same twentieth century, another pole existed. A genuinely different one. Most hairdressers I’ve encountered don’t know about it. And because they don’t know it exists, there’s no choice to make.

I used to be one of them.

There are approaches that begin not with a blueprint, but with the material itself — approaches that try to read what the hair is before deciding what to do with it. The design emerges afterward, or sometimes not until the very end.

Those other schools grew in Paris and New York, in different forms.

That’s where this series goes next.


“Three Schools of Haircutting”
→ #1 Geometry and Liberation — How Vidal Sassoon Changed the World with a Pair of Scissors(本稿)
→ #2 The Art of the Invisible Cut — Effilage and the French School of Haircutting
→ #3 Haircut as Sculpture — New York Dry Cutting and the Street Where Two Schools Met


→ 日本語版はこちら

カテゴリHAIR WORKS NOTES 関連タグ:English Post

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