Final answer:
The ancestors of present-day Japanese settled in the Yamato Plain near Nara and Osaka. The Yamato Plain, located in the Kinai region, played a significant role in the early development and history of Japan.
Step-by-step explanation:
The ancestors of present-day Japanese settled in the Yamato Plain near the modern cities of Nara and Osaka. The Yamato Plain, located in the Kinai region, played a significant role in the early development and history of Japan. As the Yamato court gradually centralized control in this region, it became a cultural and political center for the Yamato clan.