This is a continuous climbing kiln whose shape is like a bamboo tube split in two and laid down on a slope. Porcelain kilns in the North Korean region are generally of the split-bamboo type, with a non-stage kiln floor. The split bamboo type is also found in the early Onjidake kilns in Hizen Province (Saga Prefecture), and these kilns are of the stepped type with a kiln floor. First, clay is piled up on the ground to form a long, sloping platform, and then a shallow, sloping ditch is made in the platform. A clay vault is constructed from the walls on either side of this trench, with a mouth at the lowest point in the front and a smoke vent at the highest point in the rear. The interior of the kiln is divided into ten or more chambers by partition walls. In September 1970, four semi-underground, continuous-cell, stepless split bamboo kilns were discovered in the east and west cavities of Toki City, Gifu Prefecture, during a survey of kiln sites in the Jorinji district of Toki City, Gifu Prefecture, following the construction of the Chuo Expressway. These kilns are not found in the Karatsu or Arita regions, and are considered to be evidence of the fact that the Mino region had long accepted the North Korean pottery method.
