Two kiln villages
Tsuboya is inside Naha’s walk. Yachimun no Sato is in Yomitan, on the way past Zakimi.
Look, then buy one piece
The Tsuboya museum explains the kiln and the clay, then one shop. Wrap the bottle. Do not add a beach or a boat that afternoon. Yomitan’s kilns share a drive with Zakimi — do not double back to Tsuboya in Naha.