Kutani Ware Multi Coaster Qpor Qupole Set of 4: Spring, Summer, Autumn, Winter These are Kutani-yaki coasters. Brand new, unused. They are excellent at absorbing and drying water, and can also be washed with water. It seems they can also be used as aroma stones! The designs represent spring, summer, autumn, and winter, and are very beautiful. I believe they were about 2000 yen each.