Looking at the population pyramid, you can see that this country is aging.

We played a match on the artificial turf soccer field.

This park was completely artificially made.

Artificial intelligence will be at the center of future technology.

This park has a man-made lake.

The population of Japan is decreasing.

Demography is a branch of social science that studies the structure, distribution, and changes in human population.

Watching a movie alone is enjoyable.

I went to see a movie by myself.

Kousei is my best friend.