The Archaeological Institute of the Academy of Social Sciences discovered a tomb dating back to the Bronze Age while conducting the survey of historical relics in liaison with officials from the cultural heritage protection field in Rason City.

Buried inside the rectangular tomb lying east and west was a wooden coffin. It was some 50cm deep and human bones and relics came into sight from 30cm deep and shells were 10cm deep underneath them.

The skulls and joint bones found there are estimated to belong to a man and a woman aged 20 to 30. The skulls show that the man's is brachycranic and the woman's is close to brachycranic.

Anthropological characteristics of the skulls are peculiar to ancient Koreans in the Bronze Age.

More than 20 pieces of relics were found at the tomb.

The discovery goes to prove once again that the Koreans are a resourceful and homogeneous nation that has independently lived in the same territory with one and the same blood, language and culture from ancient times.