My paternal grandfather once traveled all over Japan when he was young.

My great-grandfather used to do farming in the past.

He is studying computer science at a specialized school.

There are many different specialty stores in this town.

He is a specialist fool, with no interest in anything outside his field.

He couldn't say anything about issues outside of his field of expertise.

He has expert knowledge.

I want to learn about the history of Chouchi.

The rechargeable battery has run out, so I'm going to buy a new one.

In golf, the ball landed in a body of water.