He learned about substantialism in his philosophy class.

He interprets the world from a materialistic perspective.

He deeply believes in conspiracy theories.

He strongly supports royalism.

He strongly supports royalism.

He is an expert in ring theory and has written many papers in the field.

There is a great advantage to receiving tutoring at the teacher's home, as it allows for one-on-one instruction.

Ainai-san is my best friend.

I have been to Inner Mongolia.

I plan to travel to Inner Mongolia next year.