Since that's his own concern, we better not interfere.

He should stop his selfish behavior.

It's important to believe in yourself.

I am amazed at the advancement of near-future technology.

He claims to be a time traveller.

He has a deep interest in Futurist art.

We swear to be friends forever.

Let's try to predict tomorrow's weather using the future tense.

He is passionate about his research in futurology.

Learning about the existence of Yamatai-koku is very interesting.