請願

1. Origins, structure, and basic meaning

• Structure: 請願, read せいがん, denotes a formal petition asking a public body or institution to take action.
• Basic usage: It covers formally asking an assembly to preserve a park and collecting signatures in support of that request.

2. Common pitfalls and similar expressions

• A formal request rather than a favor
  • It is a formal request asking an institution to act, distinct from an informal personal favor.