In order to approach the characteristics of the ancient tombs located in Ayeong Basin, Namwon, the structure of the tombs, the similarity of the burial patterns of the grave goods, and the characteristics of the shape of the pottery stands and horse gear from these tombs were analyzed and compared against that of the main ancient tombs of the central Gaya area. The geopolitical value of Namwon’s Ayeong Basin increased as Baekje, which intended to dominate the Namgang River system, expanded its influence. In the second quarter of the 5th century, groups close to Busan, Haman, and Hapcheon moved to the area of the ancient tombs of Cheonggye-ri. In the third and fourth quarters of the 5th century, the head of the area of the Walsan-ri Ancient Tombs grew into an independent head of state who received prestige gifts from Baekje. In the first quarter of the 6th century, interaction with Baekje were maintained, but the foundations of the material culture became similar to that of the ancient Gaya Kingdom. This change is believed to have been linked with the strengthening of Silla’s influence over Gaya forces at the mouth of the Nakdonggang River and the change of Baekje’s external transportation routes. Different locations within the basin were home to different types of ancient tombs, but it is not clear whether this represents a replacement of groups or a change within the same group of the linage that held power. Based on the data accumulated thus far, it appears that the relocation of the ancient tombs of the Ayeong Basin was caused by the migration of Gaya forces, but other interpretations may be possible if significant research results that point towards indigenous forces are accumulated in the future.