He is studying old literature.

The public prosecutor's office is investigating the incident.

He is known as an excellent researcher.

I booked a flight ticket for my trip next week.

He made a donation to the local school.

I donated to the local library.

Mr./Ms. Minoshima is my best friend.

He believes in the ways of heaven and lives by surrendering himself to the flow of nature.

I am a member of that research association.

We are choosing building materials to build a new house.