Give the reason as to why Japan invaded China.

Japan consolidated her conquest of Manchuria and in July 1937 launched a massive invasion of China. The Japanese bombed the Chinese cities, which had no military significance, and committed atrocities on the Chinese population. In 1938, they proclaimed what they called a "New Order in East Asia" which would bring Japan, China and Manchuria into a political union. They hence proclaimed this as the reason for their conquest of China.