He is the type of person who forgets the heat once it passes the throat.

Atsumu forgot to turn off the light.

My vocabulary is increasing every day.

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.

Atsumu is immersed in compiling a dictionary.

It's difficult to handle this machine.

He continued to explain earnestly.

It seems that this river is flowing backwards.

Atsushi is my classmate in junior high school.