Actually, it's not a bag, it's a knot tied with a belt. When Japanese women wear kimonos, they should wrap something on their backs that looks like a baby worn by women in small backpack and southern China. In fact, it is neither small backpack nor a baby. The Japanese call it Dai. Wearing a belt can prevent the kimono from being exhibited, show the beauty of the body, and also play a decorative role, making the gorgeous kimono more colorful.
According to textual research, the systems and meanings of "new" and "Dai" in ancient Japan are different. The etymology of "new" is "sacred dress", and "sacred" stands for sacred. The skirt is a banner cloth, which is today's skirt. Tying a new button not only combines the new button with the human heart, but also combines man with God. If in ancient times, belts focused on decoration, while belts focused on faith, then, in the Nara era, China's women's Tang clothes were introduced to Japan, and women began to wear dresses that were separated from top to bottom. After that, the belt began to be tied in the clothes, which played the role of a belt, not to mention a belt. After the Kamakura era, narrow-sleeved casual clothes (small sleeve) similar to modern kimono became popular, and the buttons were changed from the inside out, which restored the role of the belt and developed into a beautiful belt today.
China Hanfu is the ancestor of kimono. Seriously speaking, Japanese kimono originated from China Hanfu. Specifically, in the early Eastern Han Dynasty, the Japanese began to pay tribute to China. Liu Xiu, Emperor Guangwu of Han Dynasty, gave them a slave from China, Wang Jinyin, and things passed like this. During the Three Kingdoms period, the Wu Dong regime used its geographical advantages to conduct maritime trade with Japan. China's Hanfu was also introduced to Japan, and Japan began to copy and transform a lot. This is the origin of Japanese kimono. Japanese women's kimono is very similar to China's melody, and it has been called Wufu until now. So don't do it in the dark, or you may be hacked. However, in the following period of time, the exchanges between the two countries became less and less. It was not until the early Tang Dynasty that Japan was beaten out of the water by the Tang Dynasty that Japan learned from China again. During this period, different forms of Hanfu in the Tang Dynasty spread to Japan one after another. Japanese nobles like to wear Tang clothes, while ordinary people wear Hanfu. This situation has continued until now.
There are different knots on the back of the Japanese belt, which symbolize different meanings and express my beliefs and prayers. According to statistics, there are 289 kinds of common knots in Japan. The belt, usually 3-4 meters long, needs to be wrapped around the waist for three or four times. What deserves special introduction is a kind of "Nagoya Belt" in the daily department. This kind of bandwidth is 30 cm and 3.6 meters long. It is said that in the Taoshan era, Japanese women used to wear a thin belt around their waist, but they were not promoted because of their ugly image. When Toyotomi Hideyoshi attacked Korea, he was stationed in Nagoya. The geisha who gathered in Nagoya at that time wore a big bun, small sleeve clothes and green and red cylindrical ribbons woven by China craftsmen, which were very gorgeous. This fashionable dress immediately spread like wildfire, and this belt is also called "Nagoya belt".