a centralized government with its basis deeply influenced by Confucianism and Buddhism?

The building of massive tombs during the Kofun $($Tomb$)$ period.

The compilation of the Manyoshu $($Collection of Ten Thousand Leaves$).$

Prince Shotoku's Seventeen$-$Article Constitution"

The use of divination practices similar to those of the Shang dynasty

Himiko's reign over the Wa kingdom as described in the Wei Zhi. $($Wei Chronicle$)$