The Pentagon is the headquarters of the U.S. Department of Defense.

The headquarters of my company is in Tokyo.

Mr. Honbu is my best friend.

He is doing his best for the defense of the country.

We should do our best to defend our country.

He is thinking of going to America.

He said he wanted to go to America.

He is from the United States of America.

He works at the Ministry of Health, Labour and Welfare.

Let's refrain from using air conditioning for energy saving.