用件

1. Origins, structure, and basic meaning

• Structure: 用件, read ようけん, is a noun for the matter or purpose to be handled in a visit or communication.
• Basic usage: 来訪の用件を伝える states the reason for a visit, whereas 電話の用件をメモする records the business of a call.

2. Common pitfalls and similar expressions

• The matter delimited by 用件
  • 来訪の and 電話の narrow the noun to the business of a particular visit or call, not a person's purposes in general.