The transportation time of Kyodo Unyu was shorter since they were using new British ships, however, Mitsubishi increased the speed of their ships without thinking about the cost of fuel, and thus the transportation time became competitive as well.
また、所要時間については共同運輸側がイギリス製の新鋭船、山城丸などを揃えたことから優位に立っていたが、三菱側が燃料費を度外視し速度を上げたことから、こちらも競合状態となった。