That is an individual's responsibility.

Kojima is my best friend.

We went to look for an old castle.

Mr. Kojima is my best friend.

I was surprised to find a bedbug on the bed.

This is my personal opinion.

A bedbug invaded my room, so I immediately called a pest control service.

Mr. Kojima is my best friend.

Kojima is my best friend.

He is interested in special readings of kanji, and studies kanji every day.