Gosu is a blue glaze containing cobalt oxide pigments. Gosu itself is a blackish mineral, but after reduction firing, the color changes to blue.
Kairagi is one of traditional techniques for Japanese pottery, originally for Edo chawan bowls which has a granular and crisp surface on the bottom of bowl.
It has a unique appearance created by the shrinking of the glaze.
In the world of tea ceremony, people have enjoyed its taste as "scenery".
Hyozan-gama
When Yozaemon, the fourth master of the Hyozan-gama, presented pottery to Toyotomi Hideyoshi, who unified Japan in 1590, his technique was praised and he was given a red seal of approval and the surname "Hashiba". The studio follows a long tradition of pottery production.
diameter 3.0 inches (7.6cm)/width 4.3 inches(10.8cm) inc handle/height 3.9 inches (10.0cm)/weight 9.7 oz(275g)