Ichii is my best friend.

He is solely devoted to his work.

I kept talking with him for over an hour.

How is the longitude of the Earth determined?

He swore never to repeat that mistake twice.

He goes to the gym twice a day.

The certainty of success for this project is very high.

The fidelity of this television is very high.

The popularity of that band is rapidly increasing.

The difficulty level of this game is high.