political science
The academic study of politics, government, and political systems.
彼は大学で政治学を専攻している。
He is majoring in political science at university.
政治学の講義はとても興味深い。
The political science lectures are very interesting.
international politics (as a field of study)
Compound of 政治 (politics) and 学 (study, -ology), following the standard pattern for academic disciplines.