This is a high-quality tea set sold in a limited edition of only 2010 sets during the 2010 Shanghai World Expo (with box). It features 24K gold trim, and the lid of the teapot (kyusu) is adorned with natural agate. It comes with a certificate of authenticity, as shown in pic6. The tea set has a pale yellow-green base with gentle depictions of bamboo and flowers. The delicate design, including the flower buds that continue on the inside of the teacups, is likely to be well-received by Japanese people. Although it is a Chinese tea set, it would also be lovely for Japanese tea or as a sake cup. I received this as a gift when I lived in Shanghai. Unused, stored at home in its box. This is a valuable item with the value of being a non-sale item. Pic9 shows the certificate of authenticity as a limited edition.