Cave kiln

Japanese: 窖窯 - あながま

A kiln constructed by digging a hole into the ground on a slope. Sue ware, roof tiles, and clay figurines were fired in this type of kiln, and it was used until climbing kilns were introduced from Korea at the end of the Muromachi period. There is a slight drop from the fire opening to the combustion chamber, but then the firing chamber is a steep climb, some as high as 30 degrees. A platform is placed on this slope to stabilize the pottery while it is fired. In newer kilns, a flame dividing pillar may form between the combustion chamber and the firing chamber.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

傾斜地の地面に穴を掘抜いて構築した窯。須恵器，瓦，埴輪などが焼かれ，室町時代末期に朝鮮から登り窯が入ってくるまで，この形式の窯が使用された。焚口から燃焼室へは若干下降するが，それから焼成室は急な登りになり，30度に及ぶものもある。この斜面に台を置いて土器を安定させて焼く。年代が新しくなると，分炎柱が燃焼室と焼成室の間にできることもある。

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