腕章

1. Origins, structure, and basic meaning

• Structure: 腕章 (わんしょう) combines arm 腕 and badge 章 to denote an armband marking a role.
• Basic usage: It identifies event staff, security personnel, or another designated person by a visible color or label.

2. Common pitfalls and similar expressions

• Identification rather than decoration
  • An 腕章 is worn primarily to communicate responsibility or status, not simply as an ornamental accessory.