According to Samgugsagi geographic section, the three county name were found those are Chisungwha, Majinryang, Nosawha in Jangsan County. Jangsan was the main county that is the center of Imdang tumuli through the volume of burial articles and Bulodong, Jinryang, and Jain area are the rest. Many artifacts were found in Bulo tumuli, Shinsang tumuli, and Buksari tumuli however, it is inferior in numbers. It tells us that the dominated power of the region was the Kyungsan area who built up Imdang area tumuli.