The envoy of the So clan who visited Korea in 1500 brought 115 thousand kins (69,000kg) of copper, but the Korean Dynasty purchased only one third of the total amount and told the envoy to take the rest back to Japan.
1500年に朝鮮に訪れた宗氏の使者は11万5千斤の銅を持ち込むが、朝鮮王朝は三分の一を買い取り残りを持ち帰らせる。