The Spaniards chose to ally with Japanese pirates because the latter had long plundered the Chinese seacoast and would be favorably disposed to an expedition against China.
之所以選擇日本作為合作對象，是因為西班牙人深知倭寇素來以中國沿海地區為掠奪地，他們剛好可以利用這批亡命之徒。