Japanese Dao originated from ancient fern hand Dao. Many poets in ancient China praised Japanese Dao. Besides, things like tangdao are not unearthed. The so-called tangdao is just a product of psychosexuality fabricated by Longquan knife dealers to make money. The origin of Japanese Dao is the most reliable statement at present. As far as I know, the first Japanese knife was first unearthed in the place where Xiayi people lived, and the first contact between Han Dynasty and Japanese people was in the Yayoi period, to the ancient grave era in the Southern and Northern Dynasties in China. What were our knives at that time? Hammer knife, ring knife. ?

It was only in the later generations that the unique sword appeared, and the weapons that ignored the earlier time had to be renamed and developed with the weapons that appeared later, which was also regarded as the hero who opened up the Japanese sword. The so-called Tang style broadsword was made in Japan, not the product of the Tang Dynasty in China. The Tang-style broadsword, with a slightly larger curvature, is far from tangdao's straight-edged and sharp-edged modeling. There are many knife shapes in the Tang Dynasty in history. Now the tangdao shape proposed by Longquan merchants is actually an imitation of the Tang Dynasty horizontal knife, but it is copied with the Japanese blade shape. ?

There is a saying that after Koryo Dao or Baekje Dao was introduced to Japan, the Japanese accepted and improved the shape of Koryo Dao, thus developing Japanese Dao. This statement is controversial, but one thing is that Korean Dao was formed before Tang Dynasty (6 18) and Japanese Dao (697). The shape of Korean Dao is very similar to the mountain city of later generations. ?

Although Koryo Dao and Shancheng Dao are similar in shape, their manufacturing methods (whole heat treatment and local heat treatment) are completely different. But at least it was the first country where machetes with long hands appeared. Finally, regardless of whether the Japanese sword is a Korean sword or something, their murals and swords are hundreds of years after the Northern Han Dynasty attacked the Huns. If we really plan ancestors to recognize clans, the origin should still be counted in the Central Plains cultural system.