Koushirou is my best friend.

Père David's deer, also known as the 'four unlike', is a species of deer native to China and is listed as an endangered species.

My new car is a four-wheel drive.

Amaterasu Omikami is one of the gods our ancestors believed in.

I am planning to go to Gangwon in Korea next week.

He has no knowledge about anal sex.

He started training his anal sphincter.

He is majoring in syntax at university.

He is an expert in enzymology and conducts many researches.

You can use spectroscopy to examine the components of a substance.