What was the ruling structure of ancient japan and when did this structure begin?

The ruling structure of ancient Japan was as follows:

1. The noble class

- The King or Emperor

- The Daimyo

- The Samurai

2. The common man or peasant class

- The farmers

- Artisans and craftsmen

3. The merchants

This structure in the Japanese society began in the seventh century BC, more specifically in 660 BC, with the first emperor of Japan, Jimmu.