Kofun Sue ware was fired in a Korean-style anagama (single-chamber climbing kilns). They would reach a temperatures of 1000 to 1100 degrees Celsius, located on hillsides, "whose walls were plastered with clay... they were 10 meters long, 2 meters wide, and 1.5 meters high, with a rising gradient of 30 degrees." (Yakimono). They were used for about a thousand years, until the Momoyama Period.

For more information on anagama and Kofun art, please visit to http://www.metmuseum.org/toah/hd/kofu/hd_kofu.htm.