Japan's administrative divisions are divided into prefectures and municipalities.

My friend was diagnosed with keratoconus.

My mother is going to the ophthalmologist because of keratitis.

He composed a fantasia for the piano.

We took a walk in the primeval forest over the weekend.

This word is etymologically derived from Latin.

He is excited to learn a new programming language.

We need to find a new source of supply.

Gonogorōemon is a historical name in Japan.

Protozoans are single-celled organisms.