They're separated by the South China Sea.
It led to Japanese expansion into China--during the 1930s, Japan expanded their territory into mineral rich areas of Manchuria and then continued to invade China.
The goal of this expansion was to become a dominant world power as well as secure markets and resources the small island nation needed to become an industrial power.
"The Indian Reorganization Act improved the political, economic, and social conditions of American Indians in a number of ways: privatization was terminated; some of the land taken was returned and new land could be purchased with federal funds; a policy of tribal self-government was implemented; tribes were allowed to incorporate businesses and credit established to further such business; and education & employment opportunities were greatly enhanced"
Hope this helped :)
La mento y astalesmethaleto