Kawachi is my best friend.

His actions led to the problem.

That accident was caused by his lack of attention.

The mesosphere is a part of the Earth's atmosphere, located between the stratosphere and the thermosphere.

He likes to write novels.

The Democratic People's Republic of Korea is located in Asia.

He was involved in anti-Japanese activities.

He feels like a loner at school.

If you grow vegetables in this good quality soil, you can get very delicious vegetables.

He is studying the history of the Taiping rebels.