There are five monophthongs in Japanese.

He bought five apples.

He is studying Japanese.

This problem is simply a matter of not having enough time.

The lens of this camera is easy to attach and remove.

In this old document, the usage of vowels is different from today.

My friend is a mother of quintuplets.

I am interested in Japanese language education.

She is wearing an unlined kimono and enjoying the summer heat.

We respect the principle of monogamy.