Caring for your vintage chawan, yunomi and ikebana vase.
Owning a vintage Japanese ceramic piece is more than having it.
It is a connection to a craft tradition, to the hands that made it, and to everyone who used it before you. With the right care, it will outlast you too.
These pieces were made for daily use. They are not fragile. But they are porous, and that changes how you look after them, slightly differently depending on what the piece is actually for. Chawan and yunomi hold tea for minutes at a time. A vase holds water for days. The steps below cover all three.
Step 1: Before the first use, waking the clay
Vintage ceramics have often been sitting dormant for years. Before you use your chawan or yunomi for the first time, give it a gentle soak in lukewarm water for ten to fifteen minutes. This allows the clay to slowly rehydrate and prevents it from absorbing too much liquid too quickly on first use.
Never pour boiling water directly into a cold bowl. Pre-warm it first with lukewarm water, then gradually increase the temperature. The clay and the glaze expand at slightly different rates, and a sudden temperature shock can cause stress in the material over time.
Step 2: Daily cleaning, keep it simple
Rinse your bowl with warm water immediately after use. That is all it needs. Use your fingers or a very soft cloth to remove any residue. No sponges, no abrasive materials.
Do not use dish soap. The porous clay will absorb detergent just as readily as it absorbs tea, and your next cup will taste of it. Water is enough.
A chawan or yunomi should never go in the dishwasher. The heat, the pressure and the detergents will damage the glaze and accelerate crazing in ways that have nothing to do with the beautiful transformation you want.
Step 3: Understanding the glaze and what it does over time
Over weeks and months of use you will notice tiny lines appearing across the glaze. This is kannyu, crazing, and it is not damage. It is the bowl beginning to record its life with you. Tea slowly seeps into those fine cracks, staining them amber or brown. The surface gradually warms in tone. After years of use the bowl becomes uniquely yours, marked by your particular tea practice and no one else's.
If you want to slow the colour change, soak the bowl in plain water for a few minutes before each use. The clay will absorb water instead of tea. Most people do not do this. They want the transformation.
Not every piece ages this way. Fully glazed ware, Kutani yunomi for example, are less porous than something like Hagi-yaki, and will stay closer to their original colour. That is not a flaw, it is simply a different clay and glaze doing what it was made to do.
Step 4: Drying and storage
This is the step most people skip and the one that matters most.
After rinsing, pat the piece dry with a clean towel and then let it air dry completely before putting it away. Do not place it upside down on a flat surface, prop it slightly so air can reach the foot. Leave it for several hours, ideally overnight.
A damp piece stored in a closed box or a dark cupboard will develop mould inside the clay. Once that happens, the flavour of your tea is affected permanently. It is not difficult to avoid: just make sure it is fully dry before you put it away.
If a yunomi set is drying together, give each piece its own space rather than stacking them while still damp. Trapped moisture between two pieces is where problems start.
If your piece came with a tomobako, the signed wooden box, store it there once it is completely dry. Never while it is still damp.
Step 5: Ikebana vases, a different kind of water problem
A vase holds standing water for days at a time, which chawan and yunomi never do. That water carries minerals, plant residue and bacteria, and if it sits too long it can leave a faint ring or cloudy deposit on the inside of the glaze.
Change the water every two to three days when the vase is in use, and rinse the inside thoroughly each time, not just a quick swirl.
If a mineral ring has already formed, a soak in lukewarm water with a small amount of white vinegar, followed by a gentle rinse, will usually lift it. Avoid abrasive brushes on painted or gilded interiors.
When the vase is not in use, make sure it is completely dry before storing it, for the same reason as Step 4.
