The public prosecutor is investigating the case.

Since that's his own concern, we better not interfere.

Depending on the situation, he might not come.

My grandmother's forty-ninth day is next week.

This secret ceremony is a mysterious ritual passed down from ancient times.

Yasuyasu is my best friend.

Looking at the starry sky in the planetarium is very romantic.

He learned the movements of the solar system using an orrery.

Yoshiaki is my best friend.

Yi Zhang is my best friend.