complex; center; multipurpose facility
Refers to a facility that combines multiple functions or services under one roof, such as a community center, sports complex, or integrated service hub.
This complex houses a library, a gym, and a daycare center.
The city is planning to build a new integrated welfare facility.
複合施設 also means a combined facility, but 総合施設 often implies a broader integration of services, while 複合施設 can simply mean a building with multiple tenants or uses.
Compound of 総合 (そうごう, 'comprehensive') and 施設 (しせつ, 'facility'). The term is a straightforward modern coinage for multipurpose public or private complexes.