The statement made by the head of the Education Committee of South Awaji Island in Japan actually exaggerates the history of Japan, because around 250 BC, Japan was still poor and in a primitive social state, and it was impossible for anything of value to trade with China. Moreover, it was hard to say whether China knew about these Japanese islands at that time.
However, the Japanese copper coins unearthed in China should verify a legend in the history of China. That is, after Qin Shihuang unified the six countries, out of the pursuit of immortality and the fantasy of ruling China forever, Qin Shihuang begged the alchemists in the world, that is, Taoist priests, hoping to find the elixir of life. At this time, a Taoist named Xu Fu appeared in front of Qin Shihuang. It is said that he was born in Qi State during the Warring States Period, claiming that he could find an elixir for Qin Shihuang, and that he was in Penglai, the abbot and Yingzhou, which are actually several islands near Qihai, and claimed that immortals lived there. Qin Shihuang believed it, appointed him as a physician and gave him a lot of money, food, clothes and so on. And lead thousands of boys and girls to these places to seek immortality and fantasize that they can get elixir of life.
Of course, the final result must be that neither the elixir nor the elixir has been found. Chuifu had no choice but to fool Qin Shihuang with kelp as an elixir. Because Qin Shihuang had never seen kelp, and kelp could be eaten as food, Qin Shihuang was fooled by Xu Fu, thinking that he really took the elixir of life.
Chui fook know, however, trick can't play for a long time, one day will be back bag, then his life is in jeopardy. Therefore, Xu Fu cheated Qin Shihuang in the name of immortality. Qin Shihuang gave him more money, food, clothes, medicine and so on. Led thousands of people, including a large number of technicians, and built many big ships to go out to sea to seek immortality. Chui fook knew he couldn't come back, so he boarded the ship and led everyone to sail eastward. First, he came to Jeju Island or present-day Korea and found people living there. So Xu Fu sent people there to stand on their own feet and taught the local people how to farm, fish, hunt whales and drain water. This is the earliest beginning of Korea. And chui fook led others to continue eastbound, came to Japan now. So, under the guidance of Xu Fu, he spread the seeds brought from China on the land of Japan, taught the technology of medicine, farming and science brought from China to Japan, and brought China characters to Japan. Why are Japanese characters different from those in China? In fact, it is because these characters have not kept pace with the simplification of China characters, and it may also be the cause of typos.
This legend is recorded in China's historical records. The Taoist priest's name is Xu Fu, which is similar to the legend. Not only that, there are also records of Xu Fudong crossing the river in the History of the Three Kingdoms and the Book of the Later Han Dynasty. Moreover, it is said that the descendants of Chui Fu who stayed in China fled to today's Zhejiang and Jiangxi in order to avoid Qin Shihuang's pursuit. Xu Maogong, the founding hero of the Tang Dynasty, is a descendant of Xu Fu. Although there is no record of Xu Fudong crossing the river in the official history of Japan, it fully shows that this history is too long for Japan, just like the legend, we came from Nuwa or whispered. However, in Yamanashi Prefecture, Japan, Mr. Miyashita's Collection of Ancient Fuji Books (also known as "Xu Fugu Asking Tian") recorded the Xu family in considerable detail, and this era was the yayoi era in Japan. According to records, after Xu Fu arrived in Japan, his seven sons' surnames were changed to Japanese surnames, the eldest son was Fukuoka, the second son was Fukushima, the third son was Fukuda, the fifth son was Fukuda, the sixth son was Fuhai, and the seventh son was Fuzhu, and then they were sent to seven places respectively. Since then, Xu Fu's descendants have spread all over Japan and gradually multiplied. Cui Fu calls himself Cui Fu in Qin Dynasty. Moreover, it was the arrival of Xu Fu that made Japan develop rapidly in all aspects, and Xu Fu was also honored as "the god of agriculture" and "the god of medicine" in Japan. Visible chui fook's contribution to Japan is considerable.
Now China copper coins unearthed in Japan are just in line with the legend of Xu Fudong's crossing time. It should be said that these copper coins were left behind after Xu Fudong crossed the sea to Japan, which should also prove that the legend of Xu Fudong crossing the sea in history is true history, thus proving that Japan's development cannot be separated from China's help. No wonder Japan later called it the authentic oriental culture of Japan. Some people say that these unearthed copper coins do not coincide with the time of the Qin Dynasty, but are earlier than the Qin Dynasty (the Qin Dynasty existed from 22/kloc-0 to 207 BC), but this just shows the authenticity of this period of history, because the Qin Dynasty was developed from the Qin State during the Warring States Period, and copper coins should have been cast during the Qin State. Later, after Qin unified the world, it also unified the national currency, and the minted currency was naturally the mint before Qin.