The region of Shigaraki in Japan has been producing wood fired pottery since the 12th century. It is fired in an Anagama, the translation meaning “cave kiln” ( the oldest type of kiln in Japan ). This can take from between a few days up to several weeks to create natural ash deposits on the pottery. The pottery is exposed directly to the smoke from the fire at temperatures up to 2500F and the fly ash, volatile salts and clay metamorphize to create an ash glaze. In medieval Japan Anagama furnaces were built on slopes to achieve better thermal properties from the terrestial insulation, the kilns literally dug into the clay as caves. Traditionally the pieces were stacked on shelves built into the walls of the kiln. The Niho kougei-kai group based here ( a group of traditional craftsmen ) strive to maintain the traditional techniques and sense of Japanese beauty while maintaining the functionality of the pottery. This firing technique is similar to Raku in that no two firings deliver the same result leading to surprising effects. Wood firing kilns create colors and effects that no other firing technique can produce. Below are some examples of this Anagama created by Shiho Kanzaki.
