有志

1. Origins, structure, and basic meaning

• Structure: 有志 is read as ゆうし and is a noun for volunteers or interested people who willingly join an activity around a shared purpose.
• Basic usage: Local participants appear in 町の有志, while organization by them appears in 有志による読書会.

2. Common pitfalls and similar expressions

• Voluntary shared purpose
  • It identifies people who choose to act because they support the purpose, not simply everyone who is available.
• Difference from 志願者
  • 志願者 formally applies for a position or role; 有志 focuses on people voluntarily gathering for a common aim.