Proportional representation is an important system to ensure the fairness of elections.

My company has introduced a layoff system.

He is doing special exercises to strengthen his depressor muscle.

Primitive communism is one of the initial forms of human social organization.

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

The history of the Empire of Japan is very interesting.

This square moated burial is one of the important archaeological sites of ancient Japan.

It is important for us to respect cultural diversity and understand each other's differences.

The depressor anguli oris is the muscle that lowers the corners of our mouth when we are sad.

She lowered her eyebrows using the depressor supercilii.