Why do Japanese kimonos always carry a bag on the back?

How did Japanese women and low-waisted small backpack come about? Before Han and Tang Dynasties, Japanese society basically belonged to the late primitive society and the early slave society. Japanese people basically live in caves, with skins and no clothes. In the Tang dynasty, Japan was influenced by many Tang dynasties and began to promote clothes. However, the nationalism, cultural centralism and chauvinism of big countries in ancient countries were very strong, so the clothes style given to Japanese barbarians in the Tang Dynasty was not the official clothes of any level in the Tang Dynasty, but the mourning clothes of the Tang Dynasty. If people who know the ancient costume culture, especially the costume culture of the Tang Dynasty, can carefully look at the differences between Japanese kimono and mourning clothes of the Tang and Ming Dynasties, they will certainly find many similarities. There is no pouch behind the mourning clothes in Tang Dynasty and Japanese kimono, and there is no pouch behind the mourning clothes in China now. 1592 after the Toyotomi Hideyoshi war in Japan, a large number of Japanese women and small packages of kimonos appeared. 1592 Japanese Toyotomi Hideyoshi War, under the joint attack of Ming Dynasty and Korea, ended in complete failure. At that time, Japan's small vassal states had just been reunified (because they had just been reunified, Japan launched the Japanese Toyotomi Hideyoshi War in 1592 because they felt that their national strength was very strong after reunification), and the country was very backward and could not afford war reparations at all. However, as a completely defeated country, Japan has to pay the demands of any form of victorious country. At that time, the Ming Dynasty and North Korea were upset by the long-term Japanese pirates, so they decided to adopt a policy of slowly destroying the Japanese. Therefore, the required war reparations are: 1, 3 barrels of intact testicles (barrels-ancient rice containers) 2, and 6,000 pieces of intact human skin every year (scars are not allowed). After years of civil war and several years of Japanese chaos in Toyotomi Hideyoshi, the ratio of male to female has been seriously unbalanced. After several years of war reparations, the number of Japanese men can almost be described as less. After seeing this situation, the Japanese government at that time found that men defending their country had been going on for a long time. Therefore, it is ordered that all fertile women must carry bedding when they go out. As long as they meet a man outside, whether familiar or unfamiliar, as long as the man is willing, women must sleep together, so as to increase the chances of pregnancy and childbirth. Since then, the habit that Japanese women have to carry bedding when they go out has been handed down. Because the climate in Japan is warmer, the bedding brought by Japanese women is not very big and heavy. Japanese women don't think that carrying a quilt on the lower back is a big burden, so after a long time, Japanese women gradually regard the backpack on the lower back as a necessity for clothes. After modern times, Japan's population pressure, especially the pressure of men, eased, and bedding gradually became smaller and became decorative clothing.