After the September 18th Incident，the Japanese Navy sent Seizaburou Kobayashi and others to Northeast China for coordinating with the Kwantung Army. And then the Naval Ad Hoc Office of Manchukuo was set up to explore water and mineral resources，persuade and train the former Northeast River Defense Fleet，command the “Japanese Navy Songhua River Rangers” to assist the Kwantung Army in suppressing the Anti Japanese armed forces. Under the background that the Japanese government took “Manchuria management” as the national policy，the Japanese Navy changed the Ad Hoc Office into the Imperial Japanese Naval Station in Manchukuo with independent military power and full responsibility for the Manchukuo Navy and related affairs，in the form of an imperial decree of the Japanese emperor in 1933. Through a series of activities of this Station，the Japanese Navy has temporarily realized its purpose of “Manchuria operation”. In 1938，the Japanese Navy revoked the Station on the grounds of completing its mission in the Manchukuo. This decision not only considered that under the long-term war of aggression against China，the Imperial Japanese Naval Station in Manchukuo with independent command might cause friction with the Kwantung Army，but also made necessary arrangements according to the Japanese Navy’s own situation and strategic layout at a deeper level.