noun
demographer
A specialist who studies population statistics, trends, and demographics.
人口統計学者は、出生率の低下について分析している。
The demographer is analyzing the decline in the birth rate.
人口統計学 is the field of demography, while 人口統計学者 refers to a person who practices it.
Compound of 人口 (population), 統計 (statistics), 学 (study), and 者 (person).