He is known as an expert in palaeoclimatology.

Mr. Sumikisiko has a rare name, doesn't he?

Korumbia is my best friend.

I went to the stationery store to buy new letter paper.

A mass noun refers to a noun that cannot be counted.

He spread the sheets on the bed.

He took out a thousand yen bill from his wallet.

The new edition of this book has been released.

I cast a ballot for the election.

He bought a new rod.