He is working for free for that project.

He was working for free for his friend.

The word 'hatarakikotoba' is used in this old document.

This region has also experienced drastic changes in the world.

The scenery of the green fields and blue sea is really beautiful.

In the past decade, the advancement of technology has changed so much that it can be described as 'drastic changes in the world'.

We respect Japanese culture.

We are going on a trip tomorrow.

When I first met her, I introduced myself saying, 'I am Japanese.'

We prioritize customer satisfaction above all else.