Legend has it that Japan was led by a minister in the Qin Dynasty to make an elixir for the emperor. Who knows which province it is from?

Let's just say that Xu Fu's trip to Japan may be true or false, and there is no direct evidence to prove it (but there is a lot of indirect evidence, especially in Japan). There are two points to prove:

1, East Asian mainland residents arrived in the Japanese archipelago in the Qin Dynasty. To be exact, during the Spring and Autumn Period and the Warring States Period, a small number of residents from the East Asian continent went to Japan. The mainlanders who went to Japan mainly fled the war and the corvee, with wuyue as the largest population source, and some Yan, Qi and Chu people.

2. Japan after the arrival of East Asian immigrants is by no means inhabited. Before this (at least dating back to the dawn of Paleolithic Age), a branch of Tungusic people migrated to Japan and thrived. They were the ancestors of Yamato, the main ethnic group in Japan.