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

Kunihide Kunitachi is my best friend.

I have been to the Republic of Vietnam.

The system of provinces was a part of the ancient political system in Japan.

In learning Japanese grammar, understanding the upper two-step conjugation is important.

When learning Japanese grammar, it is important to understand verbs of the upper monograde conjugation.

He succeeded in a difficult project with the spirit of 'ishi no ue ni mo sannen', which means great works are performed by perseverance.

The levator palpebrae superioris is the main muscle for opening the eyes.

The obliquus capitis superior muscle is part of the neck muscles, helping to tilt the head.

The superior pharyngeal constrictor plays a role in pushing food into the esophagus when swallowing.