Analyze the historical background of Japan's efforts to immigrate to Japan.

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Wrong number, which is the historical background of Japan's efforts to immigrate to Northeast China.

Just answer, that's all.

Generally speaking, the most fundamental thing is that Japan promotes immigration to the Northeast because of its small population and limited natural resources.

There are a lot of fertile soil suitable for settlement and agriculture in northeast China, and there are a lot of coal, iron and wood resources. Coastal ports such as Dalian can connect all parts of Northeast Asia-like this land of abundance, Japan naturally wants to grasp it.

At the same time, Japan's immigration in northeast China actually lasted for a long time. From the end of the Russo-Japanese War, Japan began to colonize Korea until its defeat in World War II. In different periods, the historical background of Japan's promotion of northeast immigration is slightly different.

At the end of the Russo-Japanese War, Japan colonized Korea. At this time, the purpose of promoting the colonization of northeast China is to penetrate Siberia (Vladivostok) and create a temporary buffer zone between China, Japan and Russia if possible, so as to consolidate the rule of Korea.

From then on to September 18th, Japanese consortia gradually followed suit, promoting the colonization of Northeast China on the grounds of protecting Japanese-owned railways, in fact, infiltrating Northeast China by using the power vacuum at that time.

Since September 18, the Japanese have officially invaded the northeast of China.

At this time, the northeast has already fallen into the hands of Japan, and the Japanese colonization at this time is naturally like the Korean colonization, in order to "establish the country."