The government is building a nationwide surveillance network.

He was deeply involved in the project.

He is deeply involved in the project.

The author's message is written on the opening page of this book.

I live in the Kanto region.

We are planning a campaign for the sales promotion of the new product.

We are planning a campaign for the sales promotion of the new product.

He is a sensitive person, so please be careful with your words.

He is a sensitive person, so he quickly notices small things.

The coconut crab is the world's largest terrestrial crustacean.