Japanese history had a feudal social structure for a long time.

He often acts selfishly.

His arbitrary actions confused the entire team.

He chose an expedient solution.

His absolute belief gave him the power to overcome difficulties.

He chose to live a primitive life.

This restaurant is very hygienic.

This problem can be solved with a recursive approach.

He goes to the gym regularly.

Her smile is very natural, and it feels comfortable.