He used my idea without permission.

He went to Hachijō Island to meet his father.

A small tortoise lives in my garden.

He is working as a military sergeant.

When he was young, he belonged to the army.

The study of the continental shelf is an important field in oceanography.

I want to travel to that continent someday.

I found a large tortoise in the park.

We decided to travel by land.

We decided to go by land across the mountain.