Koutarou is my best friend.

What is the height of this building?

He is working hard for the development of Asia.

A new law was enacted for public safety.

We had meetings for hours to design a new product.

He exercises his vastus lateralis muscle at the gym every day.

He is doing special exercises to strengthen his vastus medialis muscle.

By training the orbicularis oris muscle, your expressions become more expressive.

He is doing special exercises to strengthen his platysma.

The internal anal sphincter is a muscle that helps us control defecation.