Haniwa: These are clay figurines that were placed on top of kofun burial mounds during the Kofun period. They depicted various human figures such as warriors, animals, and houses.
Yamato state: The Kofun culture was centered around the Yamato state which eventually became the foundation for the Japanese imperial family and the establishment of a centralized government.
Keyhole-shaped burial mounds: Many kofun burial mounds were shaped like keyholes, with a round part at one end and a long rectangular part extending from it. These distinctive shapes are characteristic of Kofun culture.