He is majoring in Japanology at university.

He is globally recognized as an expert in Indology.

He is reading a book about demonology.

He learned about the structure of society in his civics class.

He is an expert in enzymology and conducts many researches.

He is an expert in gemology, and he is good at evaluating the quality of diamonds.

Eugenics is the science of improving human genetic qualities.

Topography is a field of study that researches terrain and geographical features.

My specialty is urology, and I am particularly interested in kidney research.

He is known as an expert in library science.