He is known as a person with learning.

I can't understand the reason for his actions.

Ri is my best friend.

His actions are not reasonable at all.

He obtained a Bachelor of Science degree.

He, who holds a PhD in science, is working as a professor of physics.

I went to the barber shop to get a haircut.

Rimiko is my best friend.

Rito is my best friend.

Kanri-san is my best friend.