Kutani-yaki isn’t something you simply store away.
It’s something you reach for — in the morning, at the table, in small quiet moments.
And caring for it is much simpler than it seems: warm water, a soft touch, and a little attention. This guide walks you through how to use, wash, and store your Kutani pieces — so the colors stay luminous in your home for many years.
What Makes Kutani-yaki Special (and a Little More Delicate)
The beauty of Kutani comes from overglaze painting — and that’s also why it needs a bit more care.
Most Japanese porcelain — think of plain white Arita or Hasami pieces — is decorated either with cobalt blue painted under the glaze, or not at all. Underglaze decoration is sealed beneath a thick, hard layer of glass and is essentially permanent. It is far less exposed to wear.
Traditional Kutani-yaki is different. The famous five colors — red, yellow, green, navy, and aubergine purple, together called Kutani-gosai — are painted on top of the already-finished glaze, and then the piece is fired a second time at a lower temperature (around 800°C) to fuse the enamel to the surface. The Japanese name for this technique is iro-e (色絵) or uwae-tsuke (上絵付け), which simply means “overglaze painting.”
This second, softer layer is what gives Kutani its jewel-like glow. It is also why Kutani asks for a little more thought at the kitchen sink. The enamel sits slightly raised on the surface, and it can be worn down over many years by three things in particular:
- Abrasion — metal cutlery, scouring pads, or another piece rubbing against it in the sink.
- Strong detergents — especially the high-alkali tablets used in dishwashers.
- Sudden temperature changes — which can craze the enamel even when the porcelain body itself is fine.
None of these damage a piece instantly. The harm, when it comes, is cumulative — small losses, repeated for years.
With just a little care, Kutani pieces are perfectly suited for everyday use.
The Three Kinds of Kutani You Will Meet
Not every Kutani piece needs exactly the same care. When you are choosing a piece, or deciding how careful to be, it helps to know which kind you have.
Traditional Kutani-gosai (the five colors)
The classic style — red, yellow, green, navy, aubergine — painted in raised enamel on a white or pale body. This is what most of this guide is about, and the advice here applies fully.
Plain white or underglaze-only Kutani
Pieces with only a cobalt-blue pattern or no decoration at all behave like ordinary porcelain. They are more forgiving: dishwashers are technically fine, though hand-washing still keeps them looking newer longer.
Kutani with gold and silver decoration (kindei, gindei, kinpaku, ginpaku)
Many Kutani pieces, from the Saiko-Kutani revival style to modern luxury work, carry gold or silver decoration. It comes in more than one form: kindei (金泥) and gindei (銀泥) are gold and silver paint, applied with a brush, while kinpaku (金箔) and ginpaku (銀箔) are leaf. Both are fired onto the piece; in some techniques the silver is even sealed beneath a layer of glaze. From the outside it is hard to tell which you have, so treat all of them gently: no scrubbing, no dishwasher, and keep silver away from eggs, mustard, and seafood (the sulphur in those foods darkens silver).
If you are unsure which kind you have, treat it as traditional Kutani-gosai. That level of care is safe for every piece.
How to Wash and Use Kutani Day-to-Day
Here are the small habits that protect your Kutani — nothing complicated, and most of them take less than a minute.
Before first use
Rinse with warm water and a soft sponge. No soap needed. Check the foot ring (the unglazed bottom that lets the piece sit flat) — if it feels rough, rest the piece on a cloth or felt pad to protect your table.
Washing
- Warm water, not hot. A sudden jump in temperature is hard on any porcelain, and on the enamel layer in particular.
- A soft sponge or cotton cloth. Microfibre is fine. No scouring pads, no “heavy-duty” scrubbers.
- A small amount of mild dish soap is acceptable. Avoid powdered cleansers and anything containing bleach.
- Wash one piece at a time when you can. Two Kutani pieces knocking together in a soapy bowl are quietly damaging each other.
- Rinse, pat dry with a soft cloth, then let it air-dry fully before putting it away.
Everyday use
- Warm the piece with a little warm water before pouring in hot tea or soup. This is especially important for thin-walled sake cups and yunomi (casual tea cups).
- Use wooden or bamboo utensils on Kutani plates when you can. Knives and forks will, over years, leave fine grey scratches.
- Slip a soft cloth or paper napkin between stacked pieces in the cupboard.
What to avoid
- The dishwasher, unless the maker says it is safe. Dishwasher detergents are strong, and the enamel sits on the surface.
- The microwave for anything with gold or silver. Metallic decoration can arc and scorch. For other pieces, go by the maker’s instructions rather than by how the piece looks.
- Long soaking. It does no good, and a piece left in the sink is a piece waiting to be knocked.
Bringing Kutani into Daily Life
Kutani-yaki was made to be used. Tea bowls, sake cups, small dishes, decorative plates — all of them last longer and age more beautifully when they are part of daily life, not locked behind glass.
A good way to start is with pieces that match a small ritual you already have. If you drink green tea in the morning, a pair of Kutani yunomi (like our Pair Yunomi Ginsai two-color set) makes the morning cup feel a little more intentional. If you host tea or matcha for friends, a single hand-painted chawan (matcha bowl) becomes the centerpiece of the evening. And if you want something small to begin with, a pair of hashioki (chopstick rests) is the gentlest way to let Kutani into your table — they cost less than a bowl, they lift the whole table setting, and they are almost impossible to damage in normal use.
The rhythm is simple: use the piece, rinse it carefully, let it breathe between uses. Over months and years, the piece stops feeling like an “expensive object” and becomes a quiet part of your home.
Editor’s Picks
Chawan — Matcha Bowl with Gold Cloud, Sakura, and Fuji. Our favorite single-piece Kutani for anyone drawn to matcha. The painted composition — gold cloud, cherry blossoms, and Mt. Fuji — sits beautifully against the pale body, and the wide form holds heat gently for a proper matcha whisk. Hand-wash only, and warm the bowl before you pour. A piece that rewards the small daily ritual of a whisked bowl. (See the piece)
Pair Yunomi — Ginsai Two-Color. Ginsai means “silver glaze,” and this pair uses a restrained two-tone palette rather than the full five colors — quieter, more everyday. They are our recommendation for anyone who wants Kutani on the table every morning without feeling precious about it. As a pair, they make a thoughtful gift for a couple or a new home. A piece you’ll find yourself reaching for every morning. (See the pair)
Pair Hashioki — Hanatsume Flower. Kutani chopstick rests shaped and painted as small flowers. Almost nothing this small brings more life to a dinner table. They are also the most forgiving Kutani pieces to own — rarely used with metal, rarely washed roughly, almost never stacked. A good first Kutani piece for anyone unsure about starting with a bowl. (See the pair)
Quick Terms
- Kutani-yaki (九谷焼) — porcelain from the Kaga region of Ishikawa, made since the mid-1600s, famous for bold overglaze painting.
- Kutani-gosai (九谷五彩) — the five classical colors: red, yellow, green, navy, and aubergine purple.
- Iro-e / uwae-tsuke (色絵・上絵付け) — overglaze painting; decoration applied on top of the finished glaze and fired a second time.
- Kindei / gindei (金泥・銀泥) — gold and silver paint, applied with a brush. Kinpaku / ginpaku (金箔・銀箔) are gold and silver leaf. Ginsai (銀彩) is silver decoration in general; in some Kutani techniques the silver is covered with glaze.
- Kodai (高台) — the foot ring at the bottom of the piece, usually unglazed so the piece sits flat.
- Kintsugi (金継ぎ) — traditional repair that mends cracks and chips with gold-coloured lacquer, turning a break into a new kind of beauty.
- Yunomi (湯吳) — a casual, everyday Japanese tea cup, taller than it is wide.
- Chawan (茶碗) — a tea bowl, used here for matcha.
FAQ
Q: Is Kutani-yaki dishwasher safe?
Some are, some are not, and you cannot tell by looking. Dishwasher suitability varies from kiln to kiln and piece to piece, so check the instructions that came with yours. If the maker has not confirmed it is dishwasher-safe, give it a one-minute hand-wash in warm water instead. We recommend hand-washing for any Kutani with overglaze colors or gold and silver — it is the surest way to keep the decoration as it was the day it arrived.
Q: Why is Kutani porcelain more delicate than other Japanese ceramics?
Because its decoration sits on top of the glaze, not beneath it. Plain Arita or Hasami porcelain is painted underneath a thick glass-like glaze and then fired at very high temperature, which makes the decoration essentially permanent. Traditional Kutani is painted in raised enamel on an already-glazed piece and fired a second time at a lower temperature (around 800°C). That second firing fuses the enamel to the surface beautifully, but the enamel layer itself is softer than the porcelain body. It is the painted surface — not the piece as a whole — that needs care.
Q: Can I put Kutani-yaki in the microwave?
Not if it has gold or silver on it — that is a firm no. Metallic decoration can arc, scorch the piece, and damage the microwave. For pieces without metal, follow the maker’s instructions rather than judging by color or appearance. If you are not sure, warm the food or tea in something marked microwave-safe, then serve it in your Kutani.
Q: How should I care for gold or silver leaf on a Kutani piece?
The rule is simple: wipe, don’t scrub. A soft, damp cloth or a gentle pass with a soft sponge is enough to clean a piece with gold or silver after use; hard rubbing wears metallic decoration over time. Keep silver pieces away from eggs, mustard, and seafood, because the sulphur in those foods darkens silver naturally. Do not leave it soaking in the sink. Avoid bleach and ammonia completely.
Q: What are the five colors of Kutani-yaki (kutani-gosai)?
The five classical colors are aka (red), ki (yellow), midori (green), kon (navy / deep blue), and murasaki (aubergine purple). They were chosen more than three centuries ago because their mineral-based pigments could survive the second, lower-temperature firing without losing brilliance. Not every Kutani piece uses all five — some styles use only two or three, and the silver-glaze ginsai tradition uses a very different palette — but when a piece is described as “Kutani-gosai,” these are the five you are looking at.
Q: How do I store Kutani-yaki for long periods?
Store Kutani in a dry, stable place, out of direct sunlight. Heat cycling above a stove or radiator is best avoided. For seasonal or gift pieces, wrap each one in acid-free tissue paper and, if possible, use the original paulownia wood box. Those boxes are not just packaging — the wood regulates humidity and protects against dust and light. If you stack pieces in a cupboard, slip felt or soft cloth between them so they never touch each other directly.
Q: What can I do if my Kutani piece chips or cracks?
Please do not throw it away. Traditional Japanese repair techniques — kintsugi (golden-seam mending) and, for more complex breaks, yobi-tsugi (a patchwork inlay that uses a fragment from another piece) — can restore a broken Kutani piece in a way that often makes it more beautiful than before. The gold seam of a kintsugi repair sits especially well on a piece that already carries gold decoration. If you are unsure what to do, please contact us before the pieces are lost; even a clean break can usually be put right.
Explore our Kutani collection — and find the piece that fits your daily rhythm.