Article: DU 004: How Japan Saved Raw Denim (1945 - today)

Apr 18, 2026

DU 004: How Japan Saved Raw Denim (1945 - today)

Summary

While American denim was being hollowed out by fast fashion and quarterly returns, Japan was quietly doing the opposite — studying vintage Levi's seam by seam, keeping vintage Toyoda shuttle looms running, and applying a thousand years of craft tradition to the problem of making a better jean. The Osaka 5 — Studio D'Artisan, Denime, Evisu, Full Count, and Warehouse — reverse-engineered vintage American denim in the 1980s and 90s and improved on it. Japan didn't rescue American equipment; it preserved its own, and used it to build something America had abandoned. The result is the finest denim in the world — and the lesson is bigger than denim.

Q&A

Why is Japanese denim considered the best in the world?

Japanese denim mills kept vintage Toyoda shuttle looms running long after American manufacturers abandoned them for faster projectile looms. They applied kaizen (continuous improvement), wabi-sabi (the beauty of things that age with use), and monozukuri (craft as a form of integrity) to the problem of making a better jean. The Osaka 5 and the mills of Kojima spent decades reverse-engineering vintage American denim and improving on it — fiber by fiber, stitch by stitch. The result is fabric designed not to look its best the day you buy it, but ten years after.

Who were the Osaka 5?

The Osaka 5 were the five Japanese brands that pioneered the modern raw selvedge revival in the 1980s and 90s: Studio D'Artisan (founded 1979), Denime (1988), Evisu (1988), Full Count (1994), and Warehouse (1995). They collectively studied vintage American jeans with scholarly rigor, reverse-engineered the construction and fabric of golden-era Levi's, and then improved on what they found. Their work defined the aesthetic and technical standards of Japanese raw denim and laid the foundation for the global heritage denim movement.

Did Japanese denim mills use American shuttle looms?

No — this is a persistent myth. Japanese mills use vintage Toyoda shuttle looms, made by Toyoda Automatic Loom Works, the company that preceded Toyota Motor Corporation. Japan never stopped using these machines. When American manufacturers abandoned shuttle looms for faster projectile looms in the 1960s and 70s, Japan simply continued with the Toyoda looms they already had. Cone Mills confirmed separately that their surplus Draper X3 looms went to scrap in the 1980s, not to Japan.

What is kaizen and how does it relate to Japanese denim?

Kaizen is the Japanese concept of continuous improvement — the idea that no process is ever finished, that there is always something to refine or understand more completely. In denim, it manifests as the Osaka 5 and Kojima mills treating each production run as an opportunity to learn something the last one hadn't taught them. It's not a business strategy — it's a worldview. The brands that practice it are not trying to scale. They are trying to get better.

What is Collect Mills and why does it matter?

Collect Mills is one of the great Japanese denim mills, based in Kojima, Okayama Prefecture — the city where Japanese selvedge denim was born. It is the mill that pioneered the use of Zimbabwe long-staple cotton with Full Count in the 1990s, a fiber chosen because it produces the closest approximation of 1940s American denim. Collect Mills later became part of the Japan Blue Group. FITTED Underground sources fabric from Collect Mills — a relationship that began when the mill reached out directly to Eric Steffen after years of his persistent outreach.

Test Your Knowledge

Click each answer to reveal whether it's correct.

1. Which city is considered the birthplace of Japanese denim?

A. Tokyo

❌ Incorrect. Tokyo was where American surplus jeans were sold in the Ameya-Yokocho market after WWII, but the Japanese denim industry took root in Kojima — a small city in Okayama Prefecture with centuries of textile tradition.

B. Osaka

❌ Incorrect. Osaka was home to the Osaka 5 brands, but the denim manufacturing tradition began in Kojima, Okayama Prefecture — where the manhole covers are printed with denim patterns and where the first Japanese selvedge denim was woven.

C. Kojima, Okayama Prefecture

✓ Correct. Kojima is a small city in Okayama Prefecture with centuries of textile tradition. In 1965 a local workwear company produced the first Japanese jeans using American denim fabric. In 1972, Kurabo produced the first Japanese selvedge denim, KD-8, and Kojima has been the center of Japanese denim production ever since.

D. Kyoto

❌ Incorrect. Kyoto is historically associated with silk weaving and traditional textile arts — not denim. Japanese denim production developed in Kojima, Okayama Prefecture.

2. Which of the following is NOT one of the Osaka 5?

A. Studio D'Artisan

❌ Incorrect. Studio D'Artisan is one of the Osaka 5 — founded in 1979 by Shigeharu Tagaki, making it the oldest of the five brands.

B. The Strike Gold

✓ Correct. The Strike Gold is not one of the Osaka 5. The five are Studio D'Artisan, Denime, Evisu, Full Count, and Warehouse. The Strike Gold is a respected Japanese heritage brand but came later and is not part of the original founding group.

C. Full Count

❌ Incorrect. Full Count is one of the Osaka 5 — founded in 1994 by Mikiharu Tsujita, a former Evisu employee, with a particular obsession with Zimbabwe long-staple cotton.

D. Warehouse

❌ Incorrect. Warehouse is one of the Osaka 5 — founded in 1995 by the Shiotani brothers, former Evisu employees, known for their stitch-counting approach to vintage reproduction.

3. What type of loom do Japanese denim mills use?

A. American Draper looms imported when US mills closed

❌ Incorrect. This is a persistent myth. Cone Mills confirmed their surplus Draper X3 looms went to scrap in the 1980s, not to Japan. Industry veterans who have visited every major Japanese denim mill confirm there are no American Draper looms in production anywhere in Japan.

B. Modern projectile looms running at lower speeds

❌ Incorrect. Japanese selvedge denim is woven on vintage shuttle looms — specifically Toyoda looms — not modern projectile looms. The shuttle loom's slower speed and narrower width are essential to the character of the fabric.

C. Vintage Toyoda shuttle looms — Japanese machines Japan never stopped using

✓ Correct. Japanese mills use vintage Toyoda shuttle looms — machines made by Toyoda Automatic Loom Works, the company that preceded Toyota Motor Corporation. When American manufacturers abandoned shuttle looms for faster projectile looms, Japan simply kept using the Toyoda looms they already had. Japan didn't rescue American equipment. It preserved its own.

D. Hand looms operated by master weavers

❌ Incorrect. Japanese selvedge denim is woven on vintage Toyoda shuttle looms — mechanical machines, not hand looms. The skill is in operating and maintaining them, not in hand-weaving.

4. What does monozukuri mean and why does it matter for denim?

A. The Japanese word for selvedge fabric

❌ Incorrect. Monozukuri means "the art of making things" — it's a manufacturing philosophy, not a textile term. The Japanese word for selvedge is mimikase or mimi (耳).

B. Continuous improvement — the idea that no process is ever finished

❌ Incorrect. That's kaizen. Monozukuri is a related but distinct concept — the art of making things, the idea that craft is a form of integrity.

C. The art of making things — the idea that craft is a form of integrity and the maker's intention lives in the object

✓ Correct. Monozukuri — the art of making things — carries a weight in Japanese culture that "manufacturing" in English does not. It's the idea that the act of making something with skill and care is itself meaningful, that craft is a form of integrity, and that the maker's intention lives in the finished object. A pair of jeans made with monozukuri carries something that a pair made to a price point does not.

D. The beauty of imperfection — finding value in things that age with use

❌ Incorrect. That's wabi-sabi. The three concepts are related but distinct: kaizen (continuous improvement), wabi-sabi (beauty of imperfection and age), and monozukuri (the art and integrity of making things).

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By Eric Steffen
Founder / Maker
FITTED Underground

There is a paradox at the heart of the denim world that takes a moment to absorb: the best denim on the planet today is not made in America. In fact, very little denim is made here anymore. It's made in Japan. In Kojima, a small city in Okayama Prefecture where the manhole covers are printed with denim patterns and the school uniforms are selvedge. In Osaka, where a handful of craftspeople in the 1980s were doing something that had no obvious commercial logic — studying forty-year-old American jeans with the intensity of archaeologists. In mills where shuttle looms clatter at the same rhythm they did in 1950, producing fabric that takes twice as long and costs twice as much as anything a modern machine can make.

This is the story of how that happened. It begins, like so much of modern Japan, with American soldiers and the end of a war.

The Soldiers Leave Their Jeans Behind

1945. The occupation of Japan is underway. American GIs stationed across the country are wearing their Levi's off-duty — to the markets, to the bars, to the makeshift movie theaters showing Hollywood films. For young Japanese people who had grown up under militarist austerity, the sight was intoxicating. The Americans were tall and loud and they wore their jeans like they owned the world, because at that moment, they more or less did. The garment carried everything that postwar Japan was hungry for: freedom, prosperity, a different way of being in the world.

When the occupation formally ended in 1952, the soldiers left. Some of their jeans stayed — sold or traded in the Ameya-Yokocho market in Tokyo's Ueno district, a sprawling bazaar of American surplus goods where young Japanese buyers paid significant sums for secondhand Levi's. These weren't fashion purchases. They were something closer to relics. The jeans meant something that money alone couldn't quite explain.

Japan had found its obsession. What it would do with that obsession over the next five decades is one of the great stories in the history of craft.

Kojima: Where Japanese Denim Was Born

The Japanese denim industry didn't begin in Tokyo or Osaka. It began in Kojima — a small city in Okayama Prefecture with a centuries-long tradition of textile production, where craftspeople had been weaving cotton since the Edo period. In 1965, a local workwear company called Mauro Clothing produced the first pair of Japanese jeans made with American denim — fabric sourced from Cone Mills in North Carolina, the same mill that supplied Levi's. Two years later they released the first Big John jeans. Japan was learning by doing, and it was learning from the best source material available.

The real turning point came in 1972, when the textile company Kurabo — after eight attempts — successfully produced the first Japanese selvedge denim, a fabric called KD-8. The following year, Big John used KD-8 to make the first pair of jeans produced entirely in Japan. The country no longer needed to import the cloth. It could make its own.

What happened next was not a business strategy. It was something more like devotion.

The Osaka 5: Obsession as a Business Model

In the late 1970s and 1980s, while American denim brands were chasing acid wash and designer logos, a handful of young entrepreneurs in Osaka were doing something that made no obvious commercial sense. They were buying vintage American jeans — Levi's 501XXs from the 1940s and 50s, the selvedge jeans produced on shuttle looms before American brands switched to faster, cheaper projectile looms in the late 1960s — and studying them with the rigor of scholars. Every stitch. Every rivet. Every variation in the fabric from one production run to the next. They were asking a question that American industry had stopped asking: what made these so good?

The leader of this movement was Hidehiko Yamane, who worked at a small Osaka vintage boutique called Lapine in the late 1980s, handling and examining old American jeans day after day. In 1988 he got hold of an archaic shuttle loom and began making his own version of the 1944 Levi's 501XX — 14 pairs a day, each one finished by hand, each one marked on the back pocket with a white hand-painted seagull — an homage to Levi's arcuate stitching, reinterpreted as something distinctly his own. He called the brand Evis, a riff on Levi's and a nod to Ebisu, the Buddhist god of prosperity. They sold out immediately. Legal pressure from Levi's eventually forced a name change — the brand became Evisu, which also evokes the Japanese transliteration of "Elvis," a fitting tribute to the American mythology that had started it all.

They were asking a question that American industry had stopped asking: what made these so good?

Yamane was not alone. Studio D'Artisan had been founded in Osaka in 1979 by Shigeharu Tagaki, already working in pure indigo selvedge denim at a time when acid wash dominated the global market. Denime followed in 1988, founded by Yoshiyuki Hayashi, whose mission was the most faithful possible reproduction of the classic Levi's 501. Full Count launched in 1994 — founded by Mikiharu Tsujita, a former Evisu employee who brought a singular obsession with long-staple Zimbabwe cotton, a fiber he believed produced the closest approximation of the American denim of the 1940s. Warehouse launched in 1995, founded by the Shiotani brothers — also onetime Evisu employees — whose stitch-counting, super-detailed approach to vintage reproduction set a new standard for precision in the field. Together these five companies became known as the Osaka 5, and their collective impact on the denim world cannot be overstated. They didn't just preserve a craft. They elevated it. They reverse-engineered a golden era and then improved on it, fiber by fiber, stitch by stitch, wash by wash.

The Looms They Never Stopped Using

A persistent myth holds that Japanese denim mills bought surplus American shuttle looms when US manufacturers abandoned them in the 1960s and 70s — that Japanese craftspeople literally rescued American equipment and kept it running. It's a romantic story. It's also not true.

Japanese mills use vintage Toyoda shuttle looms — machines made by Toyoda Automatic Loom Works, the company founded by Sakichi Toyoda that preceded Toyota Motor Corporation. Toyoda developed the Model G automatic loom in 1924, and it was so technically excellent that Japanese mills were still running descendants of that design decades later. When American manufacturers abandoned shuttle looms for faster projectile looms, Japan simply kept using the Toyoda looms they already had. They didn't need to import American equipment. They had their own — and they were better at maintaining and operating them than anyone else in the world.

Japan didn't rescue American equipment. It preserved its own — and used it to build something America had abandoned.

The myth of the imported American looms appears to have originated with Hidehiko Yamane himself, who told a journalist around 2000 that he had brought Levi's looms back to Japan. When it was pointed out that Levi's had never owned looms — they bought fabric from mills like Cone — the story evolved. But industry veterans who have visited every major Japanese denim mill confirm: no American Draper looms in production anywhere. All Toyoda. Cone Mills confirmed separately that their surplus Draper X3 looms went to scrap in the 1980s, not to Japan.

The accurate story is more interesting than the myth. Japan didn't rescue American equipment. It preserved its own — and used it to build something America had abandoned.

The Philosophy Behind the Fabric

To understand why Japan produced this and America did not, you have to understand something about Japanese manufacturing culture that doesn't translate cleanly into English. Three concepts come close.

The first is kaizen — continuous improvement. The idea that no process is ever finished, that there is always something to refine, something to understand more completely. Not as a business strategy but as a worldview. The Osaka 5 and the mills of Kojima were not trying to scale. They were trying to get better. Each new production run was an opportunity to learn something the last one hadn't taught them.

The second is wabi-sabi — the beauty of imperfection, of things that are created by hand, and bear the marks of time and use. Raw denim is perhaps the purest wearable expression of wabi-sabi that exists. A pair of raw selvedge jeans is made by skilled craftspeople, and not yet finished when you buy them. They are a collaboration between the maker and the wearer, shaped by the specific contours of your body, your habits, your daily life. The fades you earn over years of wear are yours alone. No two pairs age the same way. That's not a flaw — it's the point.

The third is monozukuri — the art of making things. In Japanese culture this carries a weight that "manufacturing" in English does not. Monozukuri is not just production. It is the idea that the act of making something with skill and care is itself meaningful — that craft is a form of integrity, that the maker's intention lives in the object. A pair of jeans made with monozukuri carries something in it that a pair of jeans made to a price point does not, and the person wearing it can feel the difference even if they can't name it.

At FITTED Underground, we have a formula. (As a former physicist, perhaps this is unsurprising.) The formula is:

CRAFT + DEVOTION = ART

It pulls these three concepts together. What they share is a commitment to craft in a world that rewards speed — to quality over consumption, to meaning over margin.

Japanese denim culture produced the world's best fabric because a critical mass of craftspeople were willing to go slowly in an era when the whole world was speeding up — and a critical mass of society chose to value what they were doing.

Japanese denim culture didn't produce the world's best fabric because Japan is wealthy or lucky. It produced great jeans because a critical mass of Japanese craftspeople were willing to go slowly in an era when the whole world was speeding up — and a critical mass of society understood what they were doing, valued it, and chose to purchase their goods. That is not a cultural quirk. It is a model. And it is one that the rest of the world, and America in particular, left behind.

A Mill Reaches Out to Brooklyn

I want to tell you about a special moment in our history, and how it first meaningfully intersected with Japanese denim craftsmanship.

After years of learning the skill of sewing selvedge denim jeans in a basement from the ground up, I knew I had to up my fabric game. I had fine denim, but I wanted to offer the best to my customers — especially after Cone Mills had closed their White Oak plant.

I had been in contact with a number of Japanese mills, but I had always tried to establish a relationship with Collect Mills — one of the great Japanese denim mills, based in Kojima. It is the same mill that pioneered Zimbabwe long-staple cotton with Full Count in the 1990s and later became part of the Japan Blue Group.

There I was in a basement. Emailing. Reaching out through contacts. Calling Japan not knowing the language! Consistently getting no response. Then one day an email arrived in my inbox with a subject line I wasn't expecting: We would like to start a business relationship with you.

That email changed how I work, and what fabrics I could provide to my customers.

What I've come to understand about Japanese denim — working with Collect and other Japanese mills — is that the character in the fabric is intentional. The slub, the irregularity in the weave, the way the indigo sits on the surface of the yarn but leaves the core white — they are "imperfections," but they are not accidents. They are the result of decades of refinement, of craftspeople who understood that a fabric designed to develop over time requires different choices than a fabric designed to look good on a rack. Most things in this world are made to look their best the day you buy them.

Japanese selvedge denim is made to look its best ten years after you buy it. That's a radical act in a world built around disposability.

Japanese selvedge denim is made to look its best ten years after you buy it. That's a radical act in a world built around disposability. It's also why we at FITTED Underground use it.

What We Got Wrong — and How We Can Get it Right

Here's the uncomfortable truth the history of denim forces us to confront: America invented something extraordinary, then abandoned it in pursuit of something cheaper and more scalable. Japan inherited what America discarded, honored it, improved it, and sent it back.

That's not a story about Japan being superior. It's a story about what happens when a society tips too far in one direction. America didn't lose its denim industry because American craftspeople stopped caring. It lost it because the economic incentives of late-twentieth-century capitalism systematically rewarded volume over quality, speed over care, the quarterly return over the generational investment. And when that happens, the things that can't be done cheaply get done badly or don't get done at all.

The Japanese denim revival is a case study in what it looks like when a culture chooses differently. When it decides that some things are worth doing slowly. That some products are worth their cost. That the person who makes something and the person who wears it are in a relationship that deserves more than a barcode. These are not exotic ideas. They are old ones — old enough to predate capitalism itself. What Japan did was remember them at the right moment. The question now is whether America is ready to remember them too.

That's the lesson we're trying to reintroduce on these shores from a Brooklyn basement. To rebalance capitalism with craft.

The Return

By the late 1990s, Western denim enthusiasts were beginning to discover the Osaka 5 through early internet forums — posting side-by-side comparisons of Japanese selvedge and vintage American denim, debating fabric weights and fade patterns with the intensity of wine sommeliers. The verdict was clear: Japanese craftspeople had not just preserved what America had discarded. In many ways they had surpassed it.

Jay-Z name-dropped Evisu. The brand crossed into hip-hop culture. Momotaro, Samurai, Iron Heart, and Pure Blue Japan built devoted followings among a different kind of enthusiast — people who wanted to wear something made with attention, something that would develop character over years of wear, something that rewarded patience in a world that had stopped asking anyone to be patient.

By 2010, the raw denim revival was beginning to take hold in American cities. Rogue Territory launched in Los Angeles in 2008 as a bespoke denim workshop before pivoting to ready-to-wear. Tellason launched the same year in San Francisco, sourcing Cone Mills selvedge and cutting everything locally. 3sixteen made its denim pivot in 2008, partnering with Kuroki Mills in Japan to develop custom fabric cut and sewn in the US. Railcar Fine Goods launched in 2010 — founded by a Los Angeles Metro mechanic named Steven Dang who started sewing jeans in a spare bedroom between graveyard shifts and built something extraordinary one pair at a time. Freenote Cloth followed in 2013 in Southern California. Small brands. Independent founders. No outside capital. All of them betting that a consumer existed who wanted to know where their jeans came from and why it mattered.

They were right. The movement had come home.

What Comes Next

The story of Japanese denim is ultimately a story about what happens when a culture decides that craft matters more than convenience — that the slow, the deliberate, the honest are worth preserving even when the market says otherwise. That commitment is not uniquely Japanese. It is human. And it is beginning to resurface in unexpected places, including the borough of Brooklyn, where things used to be made and where a small number of people are trying to make them again. That story — and what it might mean for the future of American manufacturing, American values, and the jeans you're wearing right now — is DU 005.

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