The Portuguese, for their part, had long been sending Jesuit missionaries to Japan, and Portuguese traders had years of experience there. As such, they were very familiar with the situation in East Asia, and were in a good position to provide accurate information.
而與西班牙為鄰的葡萄牙人早年即派耶穌會人士前往日本傳教，且與日本有多年貿易經驗，對亞洲情況暸如指掌，可以提供正確的情報及訊息。