noun
houses and inhabitants; population
Refers to the number of households and the people living in them, often used in historical or administrative contexts. Not a common everyday word.
江戸時代の戸口調査によると、この村の戸口は約二百人だった。
According to the Edo-period census, the population of this village was about two hundred.
Compound of 戸 (ko, 'door' or 'house') and 口 (kō, 'mouth' or 'opening'), here used in the sense of 'household' and 'count'. The exact historical derivation is uncertain.