幹事

1. Origins, structure, and basic meaning

• Structure: 幹事 (かんじ) combines organizational core 幹 and affairs 事 to denote an organizer or coordinator.
• Basic usage: It is the person who announces details and handles arrangements for a gathering.

2. Common pitfalls and similar expressions

• Operational role rather than ordinary attendance
  • 幹事 carries responsibility for coordination, booking, or communication and does not describe every participant.