Ceramic ware (Earthenware) requires to be immersed in hot water before use to avoid stain.
Hand-washing is recommended.
Do not use in the microwave oven if the item has gold or silver decoration on it.
"Kutani-yaki is pottery with overglaze painting, made in the southern cities of Kanazawa, Komatsu, Kaga, and Nomi in Ishikawa Prefecture. With its vivid colors, it has attracted many fans overseas, and many of the relatively new types of Kutani-yaki are exported, so some of you might be already familiar with it.
The history of Kutani-yaki goes back to around the 17th century. The first lord of Daishoji Domain, Maeda Toshiharu, told his retainer Goto Saijiro to go learn about pottery in Hizen-arita, after magnetite was discovered in Kaneyama, Kutani, which is now Sannaka cho, Kutani in Ishikawa Prefecture. He adopted its techniques and built a kiln in Kutani, which is said to be the beginning of Kutani-yaki.
With the exquisite use of many vivid colors such as blue, green and yellow and bold and unconventional patterns, Kutani-yaki came in many forms. It soon received high acclaim as the best representation porcelain with overglaze painting in Japan, earning praise in particular for its uniqueness and the powerful beauty of its shapes." - Japan National Tourism Organization