He is an expert in bibliography and has many publications.

He is deeply immersed in the study of Confucianism.

In geology, morphology is the field that studies the shape and structure of the terrain.

He is majoring in political science at university.

I am interested in the ancient Kyūjitai form of 雅楽.

He is a person who values practical studies.

He is majoring in medicine.

He is an expert in ecology.

He is very interested in ecology.

He is good at playing chamber music.