This is the 674th most frequent Japanese word.
人口
"Population."
The word '人口' in this sentence is used to describe the total population or the number of people living in Japan.
日本の人口は約1億2千万人です。
The population of Japan is approximately 120 million people.
Here, '人口' refers to the number of inhabitants in the town over a specific time period.
この町の人口は過去10年間で増加しました。
The population of this town has increased over the past 10 years.
In this example, '人口' is part of the phrase '人口密度,' indicating the concentration of people in a particular area or region.