Released under the GIC Framework
According to regional expert, kilns can be built into hillsides. These kilns must be lined with fire bricks, i.e. bricks that can withstand temperatures over 2376F. These kilns can reach this temperature being fired with wood and hold thermal mass for 4-5 days. This style is popular in Korea, Japan and China. Here are some local example links. This post will be enhanced upon further research.