During the Yuan dynasty, Chinese culture developed greatly.

Archi-humans are our ancestors.

This month's sales decreased by 20% compared to last month.

This phenomenon remains unexplained to scientists.

The population is decreasing.

A nuclear reactor is planned to be built in this area.

I eat brown rice every day.

Japanese declinable words, or 'yougen', include verbs, adjectives, and adjectival nouns.

He proclaimed that he would become the next president.

Gentaro is my best friend.