1934年6月在南京發生的藏本英明書記生失蹤事件，替當時出現好轉徵兆的中日關係，帶來了極大的危機。日方強硬派試圖在真相未明之際，硬將責任歸咎於中方，並藉此機會向國府進行諸般需索。對此，南京方面則在蔣中正外出的情況下，以汪兆銘為首進行了種種措置。但是細考事件始末，則可發現國府在此事件的對應上有著複雜的多重面相。汪兆銘雖然在表面上主持大局，但南京各系統皆仰承遠方蔣中正的指示，彼此橫向的聯繫與情報的交換，也缺乏有效的整合。而期間南京內部顯露出的對日強烈猜疑，造成其對情勢判斷欠缺柔軟性，並且意味著汪兆銘的對日緩和外交，其實缺乏著穩固的基盤。這些情形，事實上正呈現了蔣汪合作時期，國府對日外交的運作實態。在當時中日官方關係日趨接近的表面形象之下，此種實態亦顯現了當時中日關係發展上的條件限制。

The missing of Kuramoto, the Secretary of the Japanese Consulate-General in Nanking in June 1934, brought about a new crisis to the improving relations of Sino-Japanese. Japanese hard-liners tried to take advantage of that crisis for Japanese interests. At that time, Wang Ching-wei was supposed to be in charge of the Nationalist Government when Chiang Kai-shek was absent. Looking in more details into the Kuramoto Incident, however, we see another story. While Wang was handling the negotiations between the two nations, all the cliques in Nanking were following Chiang's instructions. Moreover, the exchanges of information as well as policy coordination among those cliques were conducted in an inefficient way. Before Kuramoto was found, the strong suspicion against Japan's intention had made the Nationalist Governmen's judgment of the situation extremely inflexible. It indicates that the reconciliation policy promoted by Wang, who had no solid foundation. This is the reality of the China's policy toward Japan in the period of Chiang-Wang Cooperation, which in fact imposed serious constraints on the development of Sino-Japanese relations, despite the seeming improvement in relationship between the two countries at the time.