A freestyle ceramic cup from Minami-gama in Toki city, Gifu prefecture.
Gosu is a cobalt blue glaze containing cobalt oxide pigments. Gosu itself is a blackish mineral, but after reduction firing, the color changes to blue.
Each handmade cup is treated Gosu brushwork. This painting shapes the cup's distinct character.
height 4.0 inches (10.0cm)/width 3.5 inches(9.0cm)/weight 6.7 oz(190g)