I don't know17th century. I only know that Tokugawa shogunate was founded in16th century, and then gradually declined in18th century. Then the United States opened the door to Japan and forced Japan to sign a series of unequal treaties. After that, the Japanese woke up, stopped learning from China and began to turn to the western capitalist system. Later, the Meiji Restoration in the19th century strengthened the rights of the Japanese emperor.

In addition, during World War II, Japan was too arrogant and captured Pearl Harbor in the United States, which led the American government to help China. After that, the American Flying Tigers appeared in China. Then the United States also dropped original submunitions on Nagasaki and Hiroshima until it finally surrendered unconditionally. At present, only Japan is allowed to have a national defense force, and the rest of the troops are not allowed to appear.