We did volunteer work in the area hit by a disaster.

Mr. Ariji is my best friend.

This area used to be a concession territory.

In ancient Chinese astronomy, they used the earthly branches to express time and direction.

He is studying the history of African Americans.

My dream is to visit the Republic of South Africa.

This company is promoting the formation of a major keiretsu.

He devised a new strategy to organize the products into a keiretsu.

It is said that dogs were the first animals to be domesticated.

His lungs have cancerated.