1. In Japanese mythology, Emperor Jimmu, a descendant of Zhao Tian, the sun god, founded Japan in 660 BC and became the emperor of Japan. This is about China during the Warring States Period. But this statement is not credible, and Japan cannot provide exact evidence.

2. The real historical basis is Japan's Yomiuri era, in which pottery, iron, bronze, paddy fields and other cultures appeared in the early days, making Japan gradually become an agricultural society. In the middle of yayoi, the king of Kyushu slave kingdom paid tribute to the Han Dynasty and was given a golden seal.

Emperor Guangwu of the Eastern Han Dynasty gave it to Wang Jinyin of Japan. Fukuoka, a city of the Han Dynasty, still displays the seal of the emperor of the Han Dynasty. It can be inferred that the origin of Japan is from the Qin Dynasty in China to the Western Han Dynasty.