Because Japanese kimonos are modeled after our costumes in the prosperous Tang Dynasty, and the costumes in the prosperous Tang Dynasty evolved from Hanfu. Because our country's modern clothing is improved by Manchu cheongsam and mandarin jacket. Most foreigners think that cheongsam and mandarin jacket belong to China, and almost no one knows Hanfu. When they look at Hanfu, they all think it is a kimono, but they don't know that Japan copied our Hanfu in the Tang Dynasty.