It is Kutani ceramic sake cup with gold leaf decoration.
Kutani is picture porcelain produced in the Kaga district of Southern Ishikawa prefecture. The origin was said to be about 1655 and it was strongly influenced by a sense of beauty of splendid Kaga Hyakumangoku culture and developed. It features the solid, gorgeous color that added gold to a Kutani five colors (red, blue, yellow, purple, Berlin blue).
The traditional style such as Kokutani, Mokubei, and the Yoshida style are probably most famous.