Mr. Kazunaka is my best friend.

Nakaei is my best friend.

My computer is currently under examination.

I go jogging every morning before noon.

In this museum, the entrance fee varies according to three age categories: adults, middle-aged, and children.

My younger brother is currently attending middle school.

He is studying the history of Central Europe.

The role of the Jijū was to handle the affairs of the imperial court.

I am busy with work during the day.

I work during the daytime.