He is training his triceps brachii muscle every day.

He goes to the gym every day to train his triceps surae muscle.

He damaged his peroneus tertius muscle due to a foot injury.

The Tokyo metropolitan region is the center of Japan's economy.

Mr. Shimooka is my best friend.

This shape is called a gyrobifastigium.

This shape is called a gyrobifastigium.

My mother prepares a traditional Japanese meal every day.

My house is located between three houses across and two houses next door.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.