What modern prefecture does the ancient Japanese place name 'Wanokuni' correspond to?

Nakoku was one of the ancient countries in Japan.

His arrow hit the target directly.

It's not appropriate to get angry because he was late.

I think such behavior is considered rude.

I was born and raised in the State of Japan.

I live in Japan.

When I hear the place name 'Tokyo', I immediately remember its beautiful scenery.

Yamato is an ancient name for Japan.

The era of Yamato was a very important period in the history of Japan.