He inserted a flower into the vase.

In Hokkaido dialect, he vomited.

A new face in the hole board was installed in the park.

The children were playing with the face in the hole board in the park.

He has prosopagnosia, which makes it very difficult to remember faces.

In Japanese grammar, postpositions play an important role.

A back vowel is a sound where the back of the tongue approaches the palate.

Back vowels are vowels that are pronounced using the back of the tongue.

Postfix notation is one method of expressing calculations.

The Kokin Wakashū is the second collection of the Chokusen Wakashū.