Hagi Ware: Four Centuries of Living Japanese Ceramics Loved by Tea Masters
Ichi-raku, ni-hagi, san-Karatsu — first Raku, second Hagi, third Karatsu.
This phrase, used for centuries in the world of Japanese tea ceremony to rank the finest tea bowls, has not changed in hundreds of years. Hagi ware has held this position among Japan’s tea ceramics for generations.
Yet the reason tea masters have loved Hagi ware is not a ranking number. It transforms with every use, mirrors the life of the person using it, and becomes — over ten years — the only piece of its kind in the world. It is this quality as “living Japanese ceramics” that makes Hagi ware so compelling.
Hagi pottery originates in Hagi City, Yamaguchi Prefecture, in western Japan, just to the left of Hiroshima on the map. It was born around the same time as Arita ware, more than 400 years ago, from a kiln founded by Korean potters who came to Japan during the samurai era, developing within the tea culture of the Chōshū Domain that flourished in the region. From its birth to this moment, Hagi pottery continues to be used in the hands of tea practitioners and Japanese ceramics lovers across Japan.
The Origins of Hagi Ware
Korean Potters of the Sixteenth Century
The history of Hagi ware reaches back to the sixteenth century and the Korean campaigns of Toyotomi Hideyoshi, who then ruled Japan.
These campaigns are sometimes called “the potters’ war.” Many of the great lords who marched under Hideyoshi’s orders brought skilled Korean potters back to Japan with them. Japanese tea culture was at its height, and a potter capable of making exceptional tea bowls was a prize worth securing.
Mōri Terumoto, lord of the Chōshū Domain, invited two Korean potters — Yi Sakko (李勺光) and Yi Kyō (李敬) — to the land of Hagi. The two brothers established kilns at Matsumoto and Mino-no-se in what is now Hagi City, Yamaguchi Prefecture, and these kilns mark the founding of Hagi pottery.
The Korean Aesthetic: Goryeo Tea Bowls
The Korean ceramic tradition that Yi Sakko and Yi Kyō brought with them resonated deeply with the aesthetic of the Goryeo (高麗) tea bowls that Japanese tea masters of the time so passionately sought.
Goryeo tea bowls are the collective name for tea bowls made during the Joseon (Yi) Dynasty period of Korea. Their practical, unadorned forms, natural asymmetry, and thick, organic glazes perfectly harmonized with the wabi-sabi sensibility at the heart of Japanese tea.
Hagi ware is the direct heir of this Korean and Goryeo tea bowl tradition. Its commitment to stripping away elaborate decoration and honoring instead the natural beauty of materials and the accidental keshiki (kiln effects) created by firing has been passed down, unbroken, into the Hagi pottery of today, four hundred years later.
The Three Great Kiln Families
Since the founding of Hagi ware, its tradition has been guarded by several kiln lineages. The three most celebrated are the Miwa family, the Saka family, and the Kaneta family. Many other kiln studios in Hagi also continue to work within the historical traditions of the region.
The Miwa family (Miwa) is one of Hagi’s most authoritative kiln lineages. Known for a distinctive style called oni-hagi (demon Hagi) — characterized by bold, dramatic kiln effects on the surface — the Miwa line has continued for thirteen generations and remains active today.
The Saka family (Saka) is another great name in Hagi pottery. Together with the Shimizu and Tahara families, the Sakas served as goyōgama — official domain kilns — producing formal, prestigious tea ceramics for the Chōshū lords.
The Kaneta family (Kaneta), working from the Tenchōzan kiln, is known for combining the traditional forms of Edo-period Hagi ware with a contemporary sensibility, and their work is highly prized by collectors in Japan and internationally.
The Softness of Hagi Ware: Clay and Glaze
Daidō Clay and Minotake Clay — Hagi’s Unique Clays
The most distinctive characteristic of Hagi ware is the softness of its clay body. This softness comes from the clay it uses.
Hagi pottery is made primarily with two types of clay: Daidō clay (大道土, daidō tsuchi) and Minotake clay (三ノ岳土, minotake tsuchi). Daidō clay is sourced from the Daidō district of Hagi City (now within Nagato City), contains a moderate amount of iron, and fires to a warm white-to-cream color. Minotake clay, gathered near Mt. Minotake to the northwest of Hagi, fires whiter and produces a softer result.
Compared to the densely fired clay body of Bizen ware, or the rough, powerful clay of Shigaraki Japanese pottery, Hagi’s clay is clearly softer. This gives Hagi pieces their characteristic lightness and that sensation of the clay gently adhering to the palm.
Most importantly, Hagi clay is porous — full of countless microscopic pores. These pores are the fundamental reason why Hagi ware is “living” Japanese ceramics. Because of this porosity, when tea is poured in, its compounds pass through the crazing in the glaze and slowly absorb into the porous clay body.
With years of use, the compounds that accumulate within the clay oxidize and merge with the piece overall, deepening the color and developing the surface over time.
Bizen ware and Hagi pottery come from nearby regions, yet their historical backgrounds and characteristics are strikingly different. Discovering the differences between pottery regions is one of the pleasures of exploring Japanese ceramics.
Milky White Glaze
The glaze on Hagi ware is made primarily from wood ash and feldspar gathered locally.
After firing, the glaze takes on a range of tones — milky white to cream, pale pink to soft gray — often shifting within a single piece. This play of color is evidence that the glaze is organic and non-uniform, not homogeneous.
The thick application of glaze gives Hagi pieces their characteristic soft, billowing quality on the surface. Neither the crisp hardness of porcelain nor the rough, austere skin of Bizen, the surface of Hagi pottery has a gentle softness to the touch, and the warmth of hot water passes through it in a rounded, gentle way — a tactile quality found only in Hagi ware.
Crazing and the Seven Transformations
Hagi ware glaze develops what is called crazing (貫入, kan’nyū) — countless fine cracks across the glaze surface created as the piece cools after being drawn from the kiln, due to the different rates at which the clay body and glaze contract.
Crazing is not a flaw. It is an intentional and essential characteristic of Hagi pottery.
Through the fine gaps of the crazing, tea, sake, and water slowly penetrate the clay body with every use. Combined with the porosity of the clay, this accumulation causes the piece to change over time. This is the mechanism behind what is known as the nana-bake — the seven transformations of Hagi.
The crazing continues to develop with daily use, growing into a pattern unique to that specific piece. Since the cracking remains within the glaze layer, it has no effect on how the piece functions.
The Seven Transformations: The Experience of Japanese Ceramics That “Grow”
The single most distinctive quality that sets Hagi ware apart from all other Japanese pottery is the Hagi no nana-bake — the Seven Transformations of Hagi.
What Are the Seven Transformations?
Nana-bake (七化け) means that Hagi ware transforms — changes so profoundly through use — that it might do so seven times over. In practice, there are not literally seven discrete stages; the word conveys a meaning of “changing again and again, continuously.”
Drinking tea every day from a Hagi pottery yunomi tea cup allows tea compounds (tannins, catechins) to slowly absorb through the crazing into the porous clay body. Repeated over months and years, this changes the color of the piece.
The Timeline of Hagi’s Seven Transformations
The nana-bake of Hagi ware progresses in roughly the following stages. The rate varies considerably depending on frequency of use.
· First weeks (0–1 month): The glaze retains its original milky white. No transformation has yet begun. This is the stage for the initial water seasoning (mizu-tōshi) before first use.
· 3–6 months: A faint brownish tone begins to appear at the rim and inside surface. With daily use, this change is inevitable.
· 1 year: A warm overall tone deepens. Tea pigments have spread throughout the piece, and the expression is clearly different from the original milky white.
· 3–5 years: The depth of color increases and unique keshiki (natural markings) emerge. A piece of Hagi ware at this stage carries a presence that mass-produced Japanese pottery simply cannot match.
· 10 years or more: The piece may transform to a deep amber or warm brown — entirely different from the original milky glaze. The daily history of use is inscribed in it. It is the only piece of its kind in the world.
The Seven Transformations as the History of the User
The most important thing about the nana-bake is that the pattern of change is entirely different for each person who uses the piece.
A chawan tea bowl (chawan) used every day for matcha and a chawan used every day for gyokuro will look entirely different after a few years, even if they came from the same kiln, the same ceramic artist, and the same mold. Hagi pottery used continuously for black tea and Hagi ware used for sake will each take their own unique path of color change.
After ten years of use, a piece of Hagi ware reflects the life of the person who used it. No two pieces like it exist anywhere in the world.
This is one of the meanings behind the ranking ichi-raku, ni-hagi — where Raku ware may be described as “Japanese ceramics into which the maker’s intent is concentrated,” Hagi ware is “Japanese ceramics into which the user’s history is absorbed.”
The Shape of Hagi Ware Tea Bowls
Characteristics of the Hagi Chawan Tea Bowl
The most prized form in Hagi pottery is undoubtedly the chawan tea bowl. Typical Hagi chawan tea bowls carry specific characteristics that distinguish them from the tea bowls of other regions.
Flaring rim: The mouth opens relatively wide, allowing the piece to be held comfortably in both hands. The form is also calculated so that the keshiki inside — the glaze expression and the staining from the nana-bake — is clearly visible while preparing matcha.
Mitsu-kiri (triple-notched foot ring): Turning a piece of Hagi pottery upside down, you may find three small notches cut into the foot ring. Called mitsu-kiri or “triple notch,” this is a form unique to Hagi ware and is considered one of the hallmarks of its authenticity. Not all Hagi chawan tea bowls have this notch — it varies by kiln lineage and individual ceramicist.
Soft walls: Hagi tea bowls are not perfect circles but carry a slight organic irregularity. This organic form improves how the piece sits in the palm, contributing to the comfort of daily use.
Using Hagi Ware as Everyday Japanese Ceramics
Beyond the chawan tea bowl, Hagi pottery extends across a wide range of everyday Japanese ceramics.
Yunomi tea cups (湯呑み) are perhaps the most accessible form of Hagi ware. Many collectors begin with a yunomi tea cup as their introduction to experiencing the nana-bake through daily tea.
The combination of a guinomi sake cup (ぐい呑み) and tokkuri sake flask (徳利) is particularly popular with those who enjoy Japanese sake. The tannins and acidity of sake absorb into the clay body, creating a distinctive pattern of nana-bake unique to sake use.
Caring for Hagi Ware: Nurturing the Seven Transformations
Because Hagi pottery is porous, it requires different care from other Japanese ceramics. Proper care is also the condition for letting the nana-bake develop beautifully.
For more on caring for Japanese ceramics in general, please also refer to the guide below.
| Care | Method | Why |
|---|---|---|
| Before first use (water seasoning) | Submerge fully in water for several hours to overnight | The clay body absorbs water evenly, preventing abrupt initial staining |
| Washing | Hand wash with warm water only — no soap or detergent | The porous clay body absorbs detergent, which can affect food and drink |
| Drying & storage | Store only after fully dry | Storing while damp can cause mold to form in the crazing |
| Tea staining | Continue using — do not worry about staining | This is the nana-bake. Enjoy the transformation as it comes |
| Microwave | Avoid when possible | Rapid temperature change can open the crazing and stress the clay body |
Hagi Ware as a Collection
For Beginning Collectors
The best entry point into collecting Hagi pottery is a yunomi tea cup or a small guinomi sake cup. In the $50–$150 range, you can begin experiencing the nana-bake through daily use. The key is to use it every day. Simply displaying it on a shelf will not produce the seven transformations. Hagi ware is among the rare Japanese ceramics that deepen in character precisely through use.
For Intermediate Collectors
For those studying the tea ceremony or deepening their knowledge of Japanese pottery, a chawan tea bowl is the natural next investment. Tea bowls by active ceramic artists from the major Hagi lineages — the Miwa, Saka, and Kaneta families — are available in ranges from approximately $300 to $1,500.
For Advanced Collectors
Tea bowls by Living National Treasures and celebrated ceramic artists such as Miwa Kyūsetsu and Miwa Kazuhiko represent some of the highest-ranked works in any collection of Japanese ceramics. Properly documented pieces are also recognized as long-term assets.
Frequently Asked Questions About Hagi Ware
Q1. How did the history of Hagi ware begin, and why did it develop as the official kiln of the Chōshū Domain (Yamaguchi Prefecture)?
The history of Hagi pottery begins in the late sixteenth century, when Mōri Terumoto, lord of the Chōshū Domain, invited two accomplished Korean potters — Yi Sakko (李勺光) and Yi Kyō (李敬) — to Japan during Toyotomi Hideyoshi’s Korean campaigns.
The Mōri clan subsequently relocated their base from Hiroshima to Hagi in Yamaguchi Prefecture, and the potters followed, establishing kilns at Matsumoto in Hagi and Mino-no-se in Nagato. This founding moment marks the birth of Hagi ware. Under the warm patronage of the domain, Hagi pottery developed as a prestigious goyōgama — an official domain kiln — producing formal tea ceramics for samurai and tea masters alike. This tradition has been passed down to the great kiln families of today: the Miwa, Saka, and Kaneta lines.
Q2. Why has Hagi ware been loved by tea masters for so long, given its ranking of “first Raku, second Hagi, third Karatsu” in the tea ceremony world?
Beyond any ranking number, it is because of the nana-bake — the seven transformations — a unique quality in which Hagi Japanese ceramics live and change alongside the person using them.
Hagi pottery, as the heir of the Korean Goryeo tea bowl tradition, honors the unadorned natural beauty of materials. Rather than sitting on a shelf, it is made to be used every day, to have tea poured into it, and to develop its expression through use — a spirit of “collaboration with the user” that has captured the hearts of Japanese tea practitioners and Japanese pottery lovers for centuries.
Q3. What causes the “seven transformations” of Hagi, and what is the key to nurturing them beautifully?
The nana-bake is caused by the combination of Hagi clay’s porosity — its countless microscopic pores — and the crazing that forms across the glaze surface.
Daily use allows tea compounds (such as tannins) to slowly absorb through the crazing into the porous clay, gradually shifting the color toward a deep amber over years. To nurture this beautifully: season the piece with water before first use, wash with warm water only — no detergent, and dry fully before storage to prevent mold in the crazing.
The Beauty of Hagi Ware: A Collaboration Between Maker and User
When choosing a chawan tea bowl, understanding what sets Hagi pottery apart from the tea ceramics of other regions brings real clarity to the decision.
Where Raku ware might be described as “the concentrated intent of the maker,” Hagi ware is “a collaboration between maker and user.” The ceramic artist gives it form; the kiln sets the glaze; and thereafter, with every cup of tea poured, the user participates in the making of the piece. The creator of Hagi Japanese ceramics is not only the ceramicist — it is also the person who uses it every day.
In contrast to Arita ware, which pursues a static perfection in white porcelain, Hagi pottery embodies a beauty that lives within change and dynamic relationship. There is no “finished” state — it continues to transform a little more each day. This is what makes Hagi ware feel not merely like craft, but like a living partner.
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