The lateral pterygoid muscle is one of the muscles used to open the jaw.

The medial pterygoid muscle is one of the important muscles for moving the jaw.

His desire is uncontrollable.

This medicine is effective for pain suppression.

The history of the Empire of Japan is very interesting.

The albatross is a seabird with long wings.

We need to minimize the system's downtime.

The Empire of Japan, written as 大日本帝國 in Kyūjitai, was a nation that existed from 1868 to 1945.

The Imperial Japanese Army was a Japanese military force that existed from the Meiji era to the Showa era.

The Imperial Japanese Navy was once the navy of Japan.