First of all, Tokugawa Ieyasu cannot achieve the goal of Japanese development without locking up the country. As the last martial artist, Tokugawa Ieyasu established a perfect feudal system, including martial arts laws and regulations, a perfect feudal constitution and a trade licensing system, which provided excellent internal conditions for the development of Japanese society from serfdom to feudalism to capitalism. During the Warring States period, the great names competed for the world and held their own interests in Christianity, Buddhism and local Shintoism. Buddhism itself was not introduced to Japan at first, and neither was Christianity. Daming supports Christianity in order to make a deal with westerners in exchange for advanced guns and strive for greater advantages in the war. The purpose of supporting Buddhism and local religions is to gain the support of local temple armed forces. In contrast, Nobunaga, Toyotomi Hideyoshi and Tokugawa Ieyasu all adopted different strategies in different periods. Nobunaga Oda got the iron cannon from the Yi people and started the journey of unifying the world. Toyotomi Hideyoshi continues to use local religions to carry out reforms; After the establishment of the shogunate, Tokugawa Ieyasu realized the stability of Christian culturally disadvantaged in the shogunate, decided to ban Christianity, changed the attitude of connivance and acquiescence towards Christianity in the past, and began to reduce contact with the outside world, so as to avoid relying on the name of the sea to build ships and buy advanced guns against the shogunate regime. At the same time, it can be said that it is effective to use the extinction of Christianity to carry out a new aggregation movement and enhance the cohesiveness of the shogunate. In the early days of Tokugawa shogunate or even earlier during the Warring States Period, westerners gradually understood the culture and structure of Japan and began to base themselves on Japanese territory. When missionaries brought Japanese swords back to Europe, Europeans saw the tenacity and preciousness of the Far East culture, and at the same time, they also enhanced Westerners' curiosity about Japan. At the same time, in the name of missionary work, European countries secretly sent people to measure the military strength, sea depth and economic situation of shogunate and other places, trying to use missionary information to spy on them, which was accompanied by the phenomenon of helping the people (peasant uprising). In order to stabilize the Tokugawa shogunate, Konka formulated many laws and regulations to restrict foreign exchanges and stipulated a fixed place to trade with a single western country. This period until the middle of the shogunate played a role in protecting the smooth development of Japanese capitalist economy and maintaining political stability. The society maintains the ruling order because of the single form of production, and is not disturbed by the trade deficit brought by the advanced productive forces in the West. At the same time, the samurai class has been preserved and has always been the ruling class! Until the later period of the shogunate, the shogunate's policies and leading institutions have failed to keep up with the development of the times and will be eliminated by history. The Tokugawa shogunate represents the interests of the landlords and samurai classes, such as the relatives and the Tokugawa capitalists. In an era when there is no war and the agricultural economic productivity is far less huge than the capitalist handicraft productivity, it is doomed to be overthrown by the coastal name representing the capitalist productivity. The arrival of the black ship is just an ordinary event that marks the disparity in strength between the two countries, and behind it is the beginning of the fall of the shogunate. At this point, the Tokugawa shogunate's closed-door policy really came to the end of history. Some people will say that it should be open before, and opening up can make Japan rich and strong. However, we should also see that during the Meiji Restoration in Japan, the life and social status of ordinary people have not been greatly improved for a long time. The physique of the gate valve replaced the rule of the samurai, and the dictatorship of the emperor replaced the control of the general. Although Japan has got rid of the restrictions of western unequal treaties and made rapid progress in modern industry, the Japanese people have really got rid of feudal constitution and lived comfortably. After the defeat in World War II, Japan began to transform into a modern country. Until World War II, many poor people moved to China, because Manchuria had cultivated land. This shows that Japan's national structure is not much different, but it has changed from a material lock-in country to a spiritual lock-in country after it became powerful.

If Tokugawa Ieyasu didn't lock the country, based on Japanese history and world history, we can imagine that some people would use western culture and Christian groups to develop peasant uprisings or arm celebrities, and the world would still be in a state of disintegration, and the Tokugawa era could not last to the fourth generation! Konka's system of using the names of Tokugawa's own family and relatives against foreign surnames will plunge this country into a war that cannot be extricated! In order to obtain advanced iron cannon in the war, the shogunate may consider supporting Christian culture, but continuing to support people in contact with westerners after the war is tantamount to adding fuel to the fire. The interests of the Tokugawa family and the samurai class represented by the Tokugawa family are bound to be defeated by westerners' cannons and capitalist management methods, and western culture will penetrate into all walks of life and every corner of society in Japan more thoroughly, so it is difficult for us to see Japanese culture. Japanese people learn things quickly. It's only 50 years now, and they have learned the American system so successfully. It is conceivable that 100~200 years later, the Japanese will be westernized to what extent, and I don't know where Tokugawa Ieyasu's tomb is! Instead of developing productive forces, it is more destructive to Japanese society! Japan opened to the outside world in the early days and finally became a colony of small Indus countries in Southeast Asia ~