He is doing a special exercise to train his occipitofrontalis muscle.

He is suffering from post-traumatic stress disorder from the war.

Kujō Yoshitsune, the former Prime Minister and Regent of the Go-Kyogoku, played an important role in Japanese history.

The rectus capitis posterior major muscle is a part of the neck muscles, and it helps in the action of pulling the head backwards.

The rectus capitis posterior minor muscle is a part of the neck muscles, and it helps tilt the head backwards.

He had a throat problem, and it was found that his posterior cricoarytenoid muscle was not functioning properly.

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.

He cautioned not to speak ill of others, saying, 'Illness enters by the mouth, and disaster does not come out of it.'

He is truly demonstrating talent that surpasses his master, just as the saying 'the student has surpassed his or her teacher' goes.

He was my student, but now he has become so proficient that it can be said 'the student has surpassed his teacher.'