My brother is a graduate student at the University of Tokyo.

He is a world-renowned researcher.

My laboratory is on the third floor of the university.

He is known as an excellent researcher.

I am a member of that research association.

We are focusing on the research and development of new products.

I conducted a research project as a summer vacation homework.

His behavior was odd and I couldn't understand it.

I couldn't understand his behavior because of its eccentricity.

The daimyo was the ruler of that region.