The Japanese Urushi Lacquer Art of Restoring Broken Vessels

What Is Kintsugi

"金継ぎ" Kintsugi is a unique Japanese technique in which broken vessels are repaired using urushi(Japanese lacquer).

In Japan, imperfections such as cracks and stains on vessels are considered to create value. The typical way of thinking is that broken vessels must be discarded. However, we believe upcycling gives new life to such vessels and enriches the lives of those who use them. By reviving the spirit of the craftsman, who has poured his or her time into the piece, the vessels can be upcycled rather than being thrown away.

This is what modern, sustainable luxury is all about. We hope that you, too, see the beauty in Kintsugi, a practice which conveys the Japanese spirit.

Finding Beauty in What Has Been Mended

The Philosophy of Kintsugi

Once broken, now traced in gold.
The fractures are not hidden — they are honored. Each seam carries the memory of what happened, and the quiet beauty of what came after.

At its heart, kintsugi is more than a restoration technique. It is a way of seeing — rooted in wabi-sabi, the Japanese appreciation of beauty in imperfection, impermanence, and quiet humility.
Over a century ago, in The Book of Tea (1906), Japanese scholar Kakuzō Okakura wrote that true refinement lies in the incomplete, the humble, and the transient. Kintsugi gives that idea a tangible form.

At The Kintsugi Labo JAPAN, this philosophy guides every piece in our hands — each golden line a quiet reminder that what is mended can be more meaningful than what was never broken.

Why Urushi — Not Gold — Is the True Heart of Kintsugi

The Soul Beneath the Gold

Traditional urushi-kaki tapping process showing four stages of harvesting natural lacquer sap directly from the bark of a Japanese urushi tree, the centuries-old craft behind authentic kintsugi

Urushi lacquer is a natural and sustainable material harvested from the sap of the lacquer tree. This practice has been part of Japanese craftsmanship for over hundreds years. Prized for its strengt adhesion, gloss, and durability, urushi lacquer forms the foundation of authentic kintsugi and is the lifeblood of Japanese lacquer art. Its unique properties enable artisans to restore and preserve objects, creating enduring works of art that reveal a quiet harmony between nature, time, and human hands.

The Power of Urushi: 6 Core Properties

01: Strong Adhesion

Protects restored ceramics from moisture and leaks.

02: Water Resistance

Protects restored ceramics from moisture and leaks.

03: Chemical Resistance

Resists acids, salts, and alcohols over time.

04: Thermal Insulation

Shields against high temperatures and heat damage.

05: Antiseptic Properties

Provides natural resistance to bacteria and mold.

06: Strong Film Formation

Forms a hard, glossy coating that reinforces durability.

Three Essential Urushi Types for Kintsugi

01: Mugi-urushi

A natural lacquer “glue” made by blending raw urushi with water and finely milled wheat flour. It forms the first bonding layer that holds the broken pieces together with strength and flexibility.

02: Kokuso-urushi

A lacquer “putty” created by mixing raw urushi with water, wheat flour, and powdered zelkova wood. It fills gaps and rebuilds missing areas, forming a durable structure beneath the later lacquer layers.

03: Sabi-urushi

A smooth lacquer “paste” made from raw urushi, water, and tonoko, a refined clay powder. It is used to refine and level the surface after the structural repair, creating a precise base for the subsequent layers of urushi and, eventually, the gold finish.

Kintsugi Tools and Materials

Traditional kintsugi begins with natural urushi lacquer, 24K gold, and specialized tools refined through generations of Japanese lacquerwork. Discover what our artists use just before the gold is applied. Select a number to explore each tool and material.

Traditional kintsugi tools and materials used by Japanese lacquer artists, including a ceramic bowl restored with urushi, bengara lacquer, 24K gold powder, silk floss, maki-e brushes, kebo, and a sea bream tooth burnisher on a wooden studio workbench
1 / 7

The Bowl, Before Gold

This is the stage collectors rarely see. The fractures have been joined and built up with layer after layer of urushi, each carefully cured. Only when the seam is perfectly smooth is it ready for sprinkling gold.

2 / 7

Maki-e Brush 蒔絵筆

A specialist fine brush designed for delicate work in urushi. The artist uses this brush to build precise layers of urushi along the seam before the final gold finish is applied.

3 / 7

Bengara Urushi 弁柄漆

Red urushi colored with iron oxide, applied in a thin, even coat just before the gold is sprinkled. Its tacky surface receives the gold powder and holds it precisely in place.

4 / 7

24K Gold Powder marufun · 丸粉

Pure 24K gold formed into fine, rounded particles. Unlike gold leaf, marufun gives traditional kintsugi its distinctive depth, durability, and soft luster.

5 / 7

Kebō Brush 毛棒

A soft brush used to sprinkle and distribute gold over the still-tacky bengara urushi. The artist controls both pressure and quantity to create an even, refined gold line.

6 / 7

Silk Floss mawata · 真綿

After sprinkling, soft silk floss is used to spread the gold evenly and remove excess powder. The remaining gold is carefully collected so that virtually nothing is wasted.

7 / 7

Traditional Gold Polishing Tool 鯛牙

A sea bream tooth mounted in a handle and traditionally used for burnishing. After the gold is secured with a thin layer of urushi, the surface is carefully polished until the seam develops its distinctive quiet luster.

How Authentic Kintsugi Is Made — A Step-by-Step Guide to the Urushi Lacquer Process

How Kintsugi Is Made

Authentic kintsugi is a slow process, unfolding over four months and nine quiet steps. Follow the journey of a cherished bowl as it is transformed from fragments to finished beauty, discovering how urushi lacquer can turn fracture into light.

  • Step 1

A Treasured Bowl Returns Broken

A customer in New York entrusted us with a beloved bowl, inherited from her grandmother and broken into many pieces. The journey of authentic kintsugi begins.

  • Step 2

Where Urushi Begins Its Work

Raw urushi is brushed onto every broken edge, soaking into the surface and laying the invisible foundation for everything that follows. The urushi itself becomes the first bond.

  • Step 3

Where Urushi Comes to Life

Urushi does not dry — it cures, slowly, in moisture. From here on, every stage follows the same quiet rhythm: apply, cure, polish. Each layer rests in the urushi-muro, a humidity chamber tended by hand through changing seasons and days. Patience is part of the craft.

Restored bowl pieces resting inside the urushi-muro, a traditional Japanese humidity-controlled curing chamber where urushi lacquer hardens slowly
  • Step 4

Mending the Pieces with Mugi-urushi

Using mugi-urushi, a natural blend of urushi lacquer and wheat flour, each fragment is patiently rejoined — even the smallest shards, set in place one by one with tweezers.

  • Step 5

Filling the Gaps with Kokuso-urushi

Where pieces are missing, kokuso-urushi, a sturdier paste made from zelkova wood powder, is shaped into the void to restore the bowl's original form, curve by curve.

  • Step 6

Refining the Surface with Sabi-urushi

A finer paste of lacquer and tonoko clay, sabi-urushi, is applied to fill any remaining tiny gaps or unevenness left on the surface. Once cured, it is patiently polished by hand with charcoal until the surface flows seamlessly again.

  • Step 7

Layering the Urushi

Apply, cure, polish — and again. Thin coats of urushi are layered, cured in the muro, and polished with charcoal. This process is repeated until the surface achieves the deep, lasting finish that defines true urushi craftsmanship.

  • Step 8

Sprinkling the Gold

Finally, a thin layer of urushi is applied. Right before it dries, fine 24-karat gold powder is sprinkled along the seams — the moment when the fracture turns to light.

  • Step 9

A Quiet Luster, Four Months in the Making

The gold is gently burnished by hand with a traditional polishing tool made of fish teeth until it takes on a soft, warm glow. Four months after arriving broken, the bowl is reborn, and every golden line honors its history.

Curious about the tools and materials behind each step?

Explore the Urushi Glossary
Beginning
Foundation
Urushi-Muro
Mending
Rebuilding
Smoothing
Building Depth
Adorning
Completion

Six Thousand Years of Japanese Lacquer, and the Birth of Mended Beauty

The Heritage of Urushi and Kintsugi

Long before kintsugi found its name, urushi had already shaped the daily lives of the Japanese for thousands of years. To understand what flows beneath each golden seam, follow the lacquer tree's story across seven chapters of Japanese history — from its earliest origins to the moment kintsugi was born, and beyond.

  1. ca. 4,000 BCE · Jōmon Period

    Where Urushi Begins

    Long before written history, the people of Japan had already learned to refine the sap of the urushi tree. Excavations have unearthed lacquered combs and vessels more than six thousand years old — among the earliest known examples of urushi craft anywhere in the world.

    Red urushi-lacquered comb excavated at the Torihama Shell Mound, an Important Cultural Property from the Early Jōmon period (ca. 4,000 BCE) — among the world's oldest known examples of urushi lacquer craft, demonstrating Japan's six-thousand-year heritage of refining lacquer-tree sap that long predates kintsugi
    Red Urushi Lacquered Comb (Torihama Shell Mound), Important Cultural Property, The Early Jomon Period (ca. 4,000 BCE) c. Fukui Prefectural Wakasa History Museum
  2. 794–1185 · Heian Period

    The Flourishing of Maki-e

    In the imperial courts of Heian-era Kyoto, urushi reached a pinnacle of refinement. Court artisans developed maki-e — sprinkling fine gold and silver powder onto wet lacquer — transforming combs, boxes, and writing instruments into glowing canvases that captured the elegance of aristocratic Japan.

    Toiletry Case with Cart Wheels in Stream design, a Heian period maki-e and mother-of-pearl masterpiece from the 12th century at Tokyo National Museum
    Toiletry Case with Cart Wheels in Stream, National Treasure, Heian period, 12th c. Tokyo National Museum / Wikimedia Commons (PD)
  3. 1336–1573 · Muromachi Period

    The Seeds of Kintsugi

    Under the Ashikaga shoguns, urushi entered a quieter, more contemplative era — shaped by Zen and the rise of the tea ceremony. It was in this period that a celadon tea bowl known as Bakōhan, mended with metal staples after returning from China, is said to have inspired Japanese artisans to seek a more graceful repair — planting the seeds of kintsugi.

    Bakōhan celadon tea bowl mended with metal staples, the Southern Song dynasty bowl associated with Shogun Ashikaga Yoshimasa and the legendary origin of kintsugi
    Bakōhan celadon tea bowl, Important Cultural Property, Southern Song dynasty, 13th c. Tokyo National Museum / Wikimedia Commons (PD)
  4. 1573–1603 · Azuchi–Momoyama Period

    The Birth of Export Lacquer

    When Portuguese traders and missionaries arrived in Japan at the end of the sixteenth century, they came across urushi for the first time and were captivated by it. They soon commissioned reliquaries, lecterns and devotional shrines from Kyoto's lacquer workshops, fusing maki-e with shimmering mother-of-pearl inlay to create nanban-shikki — the first wave of Japanese export lacquer. These treasures soon sailed back across the oceans to adorn the palaces of cardinals, kings and queens.

    Kachō Makie Raden Seigan, a 16th-century Japanese Christian shrine of gold maki-e and mother-of-pearl raden enclosing a Madonna and sleeping Christ child painting — Important Cultural Property of nanban-shikki, the first wave of Japanese export lacquer from the Azuchi–Momoyama period, Kyushu National Museum
    "Kachō Makie Raden Seigan (Christian Shrine with Lacquer and Mother-of-Pearl Inlay)," 16th century, collection of Kyushu National Museum. Image via Wikimedia Commons, licensed under CC BY 4.0.
  5. 1603–1868 · Edo Period

    A Golden Age of Lacquer

    Peace, prosperity, and a flourishing merchant class made the Edo era the high point of decorative urushi. Master designers like Ogata Kōrin fused poetry, painting, and lacquer into objects of breathtaking beauty — a tradition that captured the imagination of Europe through the export trade known abroad as "Japanning."

    Writing Box with Eight Bridges by Ogata Kōrin, a National Treasure of Edo period maki-e and mother-of-pearl artistry, early 18th century, Tokyo National Museum
    Writing Box with Eight Bridges by Ogata Kōrin, National Treasure, Edo period, 18th c. Tokyo National Museum / Wikimedia Commons (PD)
  6. 1868–1989 · Modern Era

    Tradition Meets a New World

    As Japan opened to the West, urushi artists like Shibata Zeshin found new audiences abroad while preserving centuries-old techniques at home. Later, masters such as Matsuda Gonroku were recognized as Living National Treasures, ensuring that the wisdom of urushi would pass intact into the modern century.

    Stacked food box (jūbako) with taro leaves and chrysanthemums by master Shibata Zeshin (1807–1891) — a Meiji period maki-e lacquer masterwork carrying centuries-old urushi tradition into the modern era, Mary Griggs Burke Collection, The Metropolitan Museum of Art
    Stacked Food Box (Jūbako) with Taro Plants and Chrysanthemums by Shibata Zeshin (1807–1891), Meiji period. The Metropolitan Museum of Art, Mary Griggs Burke Collection, Gift of the Mary and Jackson Burke Foundation, 2015 (2015.300.289a–g) — Public Domain
  7. Today · Contemporary Lacquer Ware

    Carrying the Craft Forward

    Today, urushi continues to inspire, being preserved by Living National Treasures, taught in master ateliers and reimagined by contemporary artists working in entirely new forms. Kintsugi is one doorway into this world, quietly succeeding the export lacquer tradition that first carried urushi across the oceans four centuries ago. Beyond that lies a living art form where the depth, light and quiet lustre of urushi invite collectors to discover its potential for much more than just restoration.

    Dosei (Saturn), a contemporary urushi lacquer sculpture by Keiko Hata depicting the ringed planet with cobalt galactic swirls on glossy black lacquer and a textured silver-leaf ring — Japanese maki-e tradition reimagined as celestial sculpture, carrying six millennia of urushi craft into entirely new artistic forms
    Destiny Stars by Keiko Hata, contemporary urushi lacquer artist, 2025. Photo by koco.fotografo / Courtesy of the artist

Discover the Art of Urushi, in Two Forms

Begin Your Own Encounter

Each piece in our studio is a continuation of the lineage you have just walked through.

Whether mended into new beauty or born as contemporary urushi art, every work invites a slow, lasting relationship with the material that has shaped Japanese craft for millennia.