Japanese Porcelain Care: Arita, Hasami, and Kutani
7 min readAn Arita teacup, Hasami plate and Kutani sake cup can share a porcelain body but need different care. The particular glaze, decoration, shape and condition matter. Use the maker’s instructions to decide how to wash and reheat with the piece, rather than relying on the region’s name.
This guide explains decoration terms and the checks that matter for washing, reheating and storage. Microwave and dishwasher permissions must be confirmed separately for the particular product.
What "Japanese porcelain" means
Japanese porcelain is called jiki (磁器). Its body is generally well vitrified, but firing temperature and water absorption vary with formulation and process. Stoneware is not uniformly porous, and a ringing sound is not a definitive material test. See our stoneware vs porcelain identification guide.
Arita, Hasami and Kutani are three well-known porcelain traditions:
- Arita-yaki (有田焼) is associated with Saga Prefecture. Its tableware includes plain white, underglaze blue and coloured overglaze decoration.
- Hasami-yaki (波佐見焼) is associated with Nagasaki Prefecture, neighbouring Arita. It has a long tradition of everyday tableware in a wide range of designs.
- Kutani-yaki (九谷焼) — Ishikawa Prefecture, central Japan. The porcelain tradition most associated with vivid overglaze enamel in the five-color (gosai) palette: green, yellow, red, purple, and dark blue. See our beginner’s guide to Kutani ware.
A regional name helps place a piece, but its individual construction and decoration determine the care it needs.
Identify your porcelain's decoration before anything else
Check whether decoration is underglaze, overglaze or metallic, then confirm the actual washing and appliance permissions. Technique is useful context, not a substitute for the product rating.
Plain white (hakuji 白磁)
Plain white porcelain has no painted colour decoration. Its glaze and shape still have their own care requirements; white does not automatically mean appliance-safe.
Sometsuke (染付) — blue and white underglaze
Sometsuke is cobalt-blue decoration beneath a transparent glaze. The glaze protects the colour, but the surface can still be damaged. It is not a promise that the ware can never scratch or wear.
Iroe (色絵) — overglaze enamel
Iroe (色絵) uses coloured enamels applied over an already fired glaze and fired again. Formulation and firing vary. Such decoration can need protection from abrasion; see our aka-e guide for the overglaze-red tradition. Do not scratch a painted surface to identify it.
Kinrande (金襴手) — gold brocade / kinsai gold
Gold decoration may take several forms, including kinsai and the more elaborate kinrande. Treat metallic-decorated ware as unsuitable for microwave use unless its maker explicitly permits that exact product; hand-wash delicate gilding as directed. See our kinrande guide for the decorative tradition.
Kakiemon and other specific styles
Named styles such as Kakiemon and Nabeshima add historical and visual context. They do not replace the care instructions for an individual vessel.
Daily care, by decoration type
Use this table as a prompt to check the product documentation, not as an appliance rating:
| Decoration | Hand wash | Dishwasher | Microwave |
|---|---|---|---|
| Plain white / hakuji | Usually suitable; check finish and condition | Confirm model rating | Confirm model rating |
| Sometsuke (underglaze blue) | Usually suitable; check finish and condition | Confirm model rating | Confirm model rating |
| Iroe (overglaze enamel) | Often preferred; follow maker | Confirm; delicate colour may need hand-washing | Confirm; iroe is not automatically metallic |
| Kinrande / gold | Normally preferred | Avoid unless explicitly permitted | Avoid unless explicitly permitted |
For a washable, sound porcelain piece, use a soft sponge and mild dishwashing detergent, rinse thoroughly and dry. Avoid abrasive pads and vigorous rubbing over decoration. Old repairs or unstable surfaces may require separate advice.
Dishwasher heat, detergents and contact between pieces can affect delicate overglaze decoration. There is no fixed one-year damage timetable. Koransha’s hand-painted Akaemachi cup, for example, is microwave-compatible but the maker does not recommend dishwasher use.
Metal decoration can arc in a microwave. Do not test it on a short cycle or low setting. If microwave compatibility is unclear, transfer the food to a confirmed microwave-rated vessel.
First use of a new piece
New porcelain generally needs washing rather than rice-water seasoning. Medome is a preparation prescribed for certain absorbent ceramics or cooking pots, not a requirement for every stoneware or earthenware object. For new porcelain:
- Rinse the piece with warm water on both sides. This removes any residual kiln dust.
- Wash gently with a soft sponge and mild dish soap.
- Rinse and dry. The piece is ready to use.
Kannyū (貫入) is glaze crackle. It can be intentional, but new crazing, structural cracks, flaking and old repairs need separate assessment. Crackle alone cannot establish that an older or unidentified piece is suitable for food. Follow the maker’s instructions for a documented crackle-glazed vessel.
Five common mistakes to avoid
- Thermal shock. Pouring boiling water into a cold porcelain piece, or moving a piece directly from a freezer to a hot oven, can crack even a heavy plate. Let pieces come to room temperature first.
- Metal scrubbers and abrasive pads. These will scratch glaze and will strip overglaze enamel and gold. Use a soft sponge.
- Long soaks for gold pieces. Kinrande and kinsai overglaze do not enjoy prolonged contact with water or detergent. Wash, rinse, dry — do not leave in a sink overnight.
- Stacking heavy pieces directly. Glaze-on-glaze stacking, especially under weight, causes hairline scratches over time. Place a paper towel or thin felt between stacked plates.
- Avoid unapproved descalers, acids and abrasive cleaners on decoration. Use the mild cleaning method specified by the maker.
Storage and stacking
Store clean, dry pieces where they will not be knocked or overloaded. For delicate decoration and heirlooms:
- Place an unbleached paper sheet (or a thin cotton cloth) between stacked plates and inside nested bowls.
- Protect delicate gold decoration from rubbing against other surfaces.
- Protect displayed pieces from accidental knocks and unsuitable cleaning. Light sensitivity depends on the actual decoration or repair; fired enamel should not be assigned a universal fading timetable.
- An original fitted box can protect a piece in storage if the object, wrapping and box are clean and dry. The box is not a substitute for stable storage conditions.
If a piece chips or develops a structural crack, stop using it for food until assessed. A repair’s suitability for food depends on its materials and the repairer’s instructions. See our guide to kintsugi.
FAQ
Is Japanese porcelain dishwasher-safe?
Some is. Check the specific product’s dishwasher rating, including decoration and repairs. Plain white, sometsuke and iroe each include products with different care directions. Delicate gilding and painted surfaces often benefit from gentle hand-washing.
Why can't gold-decorated porcelain go in the microwave?
Metallic decoration can arc in a microwave and damage the decoration, vessel or appliance. Thin lines still count as metal decoration; use a confirmed microwave-rated vessel when compatibility is unknown.
How do I know if my piece is overglaze or underglaze decoration?
Maker documentation is the most reliable guide. Colour beneath a clear glaze or raised decoration can be a visual clue, but do not use a fingernail or scratch test: mixed methods and smooth overglaze finishes can make appearances misleading.
Do I need to season a new porcelain bowl before using it?
New porcelain generally needs only gentle washing, rinsing and drying as directed. Rice-water seasoning is not a universal requirement for ceramics; use it only where the particular maker recommends it.
What does kannyū (crazing) mean — is my piece broken?
Kannyū is a network of glaze crackle, often related to differences in contraction between glaze and body. It may be intentional, but it does not prove food safety or rule out damage. Structural cracks, leaks, flaking or unknown repairs should be assessed before food use.
How is porcelain care different from stoneware or urushi care?
Porcelain, stoneware and lacquer differ in body and surface, but none has a single care rule that covers every product. Check the specific glaze, coating, decoration and condition. See our urushi lacquerware care guide for lacquered objects.
Editor’s note: Consult the individual product page for its maker, material and care directions. This guide explains terminology; it does not grant appliance permission to all pieces from a region.
