该书的研究对象——陆若汉,是与中日近世史上许多知名人物有过来往和交流的西方人,肩负耶稣会传教士、南蛮通辞、通商代理人等多重身份,在日本受到了丰臣秀吉、小西行长、德川家康、前田玄以、本多正信等许多位高权重者的知遇,得到他们的信任和重用。在中国的澳门和内地,他和徐光启、李之藻等许多重要的官员有过极为深入的交往,被认为是“有才能、知遇了活跃于16世纪末17世纪初当时所有政治 The subject of the book, Lu Ruo-han, is a Westerner who has traveled and interacted with many famous personalities in the recent history of China and Japan. He is a Jesuit missionary, a South Man speech promoter, a trade agent, and other identities. Hideyoshi, President Hideki Ieyasu, Tokugawa Ieyasu, Maeda Hsuanchi, Benjamin Masanobu and many other highly influential people have their trust and reuse. In Macao and the Mainland of China, he has had very profound contacts with many important officials such as Xu Guangqi and Li Zizhai and is considered as ”a talented person who has met all the politics that were active in the late 16th and early 17th centuries