noun
nonresident population; daytime population; visitor population
Used in urban planning, tourism, and disaster management to refer to people who are present in an area but do not live there, such as commuters, shoppers, and tourists. Contrasts with 定住人口 (resident population).
観光地では交流人口が経済を支えている。
In tourist areas, the nonresident population supports the economy.
災害時には交流人口の把握が重要だ。
During disasters, it is important to grasp the number of nonresident people present.
Compound of 交流 (exchange, interaction) and 人口 (population). The term emerged in Japanese urban planning to describe people who interact with an area without residing there.