The three ancient tombs in the So-gaya are the Jungchon-ri ancient tombs in Sancheong, Samga ancient tombs in Hapcheon, and Songhak- dong ancient tombs in Goseong.
Jungchon ancient tombs were influenced by the construction technique of Dae-gaya ancient tombs and relics such as the long sword with ring pommel.
Ancient tomb construction techniques include soil-building techniques, circular burial stone marker, and soil-building materials.
Later, the construction techniques of Samga ancient tombs and Goa-dong stone chamber were also influenced. It served as a link between Dae-gaya and So-gaya.
Samga ancient tombs is a multi-bracket system that extends the land horizontally and vertically.
It is possible to have affected the lower tombs in Dae-gaya ancient tombs.
The construction techniques of Ara-gaya ancient tombs, such as compartmental soil-building techniques and wooden structures, were influenced.
Songhak-dong ancient tombs are the most strongly married places, including the structure of tombs, tomb layout, ditch enclosure, junction, twin tombs and horse harnesses.
And clayblocks was used a lot in the construction of the clay.