Oshima is my best friend.

Mr. Ooshika is my best friend.

He goes to school every Saturday to take supplementary classes in math.

I stayed at school to attend supplementary classes in math.

We have a game at the baseball ground on the weekend.

He bought a new baseball cap.

He is a famous baseball player.

Last night, I played Yakyuken with my friends.

The Supreme Court is the final court for interpreting the laws of the country and protecting the constitution.

He lost everything.