The Meaning of jinkou [人口] In Japanese

人口
じんこう
Romaji: jinkou N3

What does 人口 mean?

Translation and Meaning

population, populace, number of people

Definition

What does 人口 (jinkou) mean? It refers to the total number of people living in a defined area (a city, region, or country) and is used to describe how many inhabitants occupy that place for demographic, planning, and statistical purposes.

Type

noun (名詞, compound noun)

Stroke Order

Meanings

  • As a statistical headcount emphasizing the number of residents rather than households or visitors.
  • Used to express demographic trends such as growth, decline, or migration patterns in a region.
  • Functions as the root for technical measures and compound terms related to people distribution and density.
  • In casual speech, used to indicate how crowded or sparsely populated a place feels.

Origin

The concept became standardized in modern Japanese during the Meiji period alongside Western-style statistics; nationwide modern censuses and formal demographic reporting emerged in the late 19th to early 20th century, making the term central to government planning, urbanization, and social policy.

Composition

  • 人 (hito): person, human
  • 口 (kuchi): mouth; here it metaphorically represents units to be counted (like ‘mouths’ to feed)
  • Combined, the characters convey the idea of counting people — the number of ‘mouths’ in a place, i.e., its population.

Usage

Common in news reports, government statistics, academic writing, urban planning, and everyday conversation when referring to the size or change of a population; appropriate in both formal and neutral registers and frequently appears combined with numbers or with terms describing density, growth, and distribution.
💡 Tips
Visualize a map filled with little mouths (口) around people (人) — many mouths to feed = a large 人口.

Variations

  • 人口数 (jinkōsū) — population count
  • 住民 (jūmin) — residents
  • 居住者 (kyojūsha) — inhabitants
  • 過疎 (kasō) — depopulation (antonymic concept)
人口