He is conducting research on natural phenomena.

He was hospitalized due to mental derangement.

The financial market is an important indicator of economic health.

My uncle owns a large dairy farm in Hokkaido.

He made a large profit in the stock market.

He is preparing his luggage for going north.

We are planning to go north tomorrow.

This wine is of the highest quality.

I used a microscope for a biology experiment.

The total length of this river is about 100 kilometers.