You need to be careful with the pronunciation of long vowels in Japanese.

He is the chief of our team.

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

The nucleus is the central part of a syllable in phonetics.

Vowel harmony plays an important role in the phonology of certain languages.

There are five monophthongs in Japanese.

There are five short vowels in Japanese.

A nasal vowel refers to a vowel that is pronounced through the nasal cavity.

I put scallions in the soup.

The committee chairman is leading the meeting.