It is thought that trade between Wakoku and the Korean kingdoms increased as Baekje, under pressure from Goguryeo to the north, began strengthening alliances with neighboring kingdoms such as Silla and Gaya.
ヤマト王権と朝鮮半島諸国との交易が活発化した背景には、北方の高句麗から圧迫を受けつつあった百済が対抗のために近隣諸国（新羅・加羅諸国）と連携を強めていたことが挙げられる。