恒例

1. Origins, structure, and basic meaning

• Structure: 恒例 is read as こうれい and means “annual custom” and “established tradition”.
• Basic usage: It denotes an annual neighborhood cleanup and group photos becoming a regular travel tradition.

2. Common pitfalls and similar expressions

• 恒例行事 / 恒例になる
  • Use 恒例行事 for a regular event and 恒例になる for an action becoming customary.