It is a paint that has made from a sap of the "Urushi" tree. The sap's original color is milky white, and add to it black, vermilion, etc. paint, before paint something.
In Japan, it has very special characteristic, and it has been in close contact with human life as paint and adhesives from way back.
It is very durable among natural paints and adhesives, and it is excellent in acid resistance, alkali resistance and water resistance.
Further, "fascinating distinctive texture" as only a "Urushi-nuri" could, is attraction of it.
This unique texture has been rated in the world, when look a "Japan" up in a dictionary, "(Japanese )lacquerware" is listed among the explanation of a word "Japan".