He was studying all day.

His character is two sides of the same coin, with kindness and strictness coexisting.

The system of 'issei-ichigen' is a historical way of dating in East Asia.

This painting is my most precious item under heaven.

My class starts at eleven o'clock.

My younger sister is twenty-one years old.

Carbon monoxide is a colorless, odorless gas, and it is dangerous to inhale.

He is having his hands full with the new project.

The mythology of Tenmoku Ikka is very interesting.

Please tell me that story once again.