Recently, a porcelain kiln site dating back to the period of the feudal Joson dynasty (1392-1910) was first discovered in the area of the east coast of Korea.

The site is in Sagi Valley about 10 kilometers distant northwestward from Muchang-dong in Rajin area of Rason City.

Remained in the site are only kiln compartment and chimney.

The kiln compartment with arch-style ceiling is located in an incline of a mountain.

Unearthed in the site are such remains as porcelain, shelf and brick.

In this regard, Dr. Jang Chol Man of the Archaeological Institute of the Academy of Social Sciences told KCNA:

The relics discovered in the site show the ancestors' high manufacturing technique of porcelain.

It can be proved by a heat controller in the middle part of the kiln.

Such techniques as fixing three lumps of earth to the bottom of porcelain for separating vitrified porcelains easily and walling the kiln with bricks and mud would be precious data in studying the then technique of manufacturing porcelain.