Mr. Hito-naga is my best friend.

The shell length of this shellfish is 5 centimeters.

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

This elongated statue is the most popular exhibit in the museum.

He is serving in the military as a sergeant.

A sea otter is a very cute animal that lives in the sea.

In the old days, people were moved by the strength and beauty of the sea lion.

A sea lion is a type of marine animal, and it is very rare.

The sea otter is a rare animal, and its ecology is not well known.

The sea otter is a very rare animal.