Your set is made in Japan for export to western world ( mainly europa ) in first half of the 20th century. Its called eggshell porcelain in the field. Some of this cups have, in the bottom, a Geisha face when you look to the bottom in the light. These sets were already mass produced in Japan and were made in moulds in stead of on a potters wheel. These sets were made in the district of Satsuma in Japan. Potters in these erea were famous all of the world for making Porcelain and earthenware pieces. The dragon is a common theme on these services but there are many other decorations. Because of the large quantity's made, you can buy them easily and prices are not that high yet.