He thinks everything is his responsibility.

He accidentally revealed a secret in his sleep talk.

He is avoiding getting involved in a love affair.

My workplace is located in the center of Tokyo.

My job is a teacher.

He succeeded in developing a charcoal-powered vehicle.

I ended up cohabiting with him.

Morality is an important element for smoothing human relationships.

The unequal distribution in this society is becoming a problem.

In order to eliminate social unfairness, everyone must cooperate.