Black Korai is a black iron-glazed tea bowl and others produced in the northeastern region of China.
During the reign of Oda Nobunaga, it was highly prized and mistakenly counted as one of the Korai tea bowls. The first Raku ware was made in an attempt to imitate this black Koryo ware. Apart from this, black-glazed stoneware produced during the Goryeo Dynasty of Korea, so-called Goryeo black porcelain, is commonly referred to as Kurogoryeo (black Koryeo). (History of Japanese Ceramics)
