団体

1. Origins, structure, and basic meaning

• Structure: 団体 (だんたい) can mean an organization with a shared purpose or a group of people. 団体が is an acting organization; 団体は is a visitor group governed by a booking rule.
• Basic usage: A local organization carries out cleanup, whereas a group of ten or more requires an advance reservation.

2. Common pitfalls and similar expressions

• Acting organization and visitor group under a rule
  • The first 団体 is close to an institution; the second is a party defined by headcount. Modifiers 地域の and 十人以上の establish the intended scope.