He found a regular dodecahedron-shaped spicy cod roe.

He made a model of a regular icosahedron.

He drew water from the well.

It is said that the education system in Japan is strict.

His energy is unstoppable.

My surname is Tanaka.

His surname has a historical background.

Education about sex is very important.

He decided to become a doctor.

I will turn 20 years old this year.