件

1. Origins, structure, and basic meaning

• Structure: 件, read けん, means a matter being discussed or handled.
• Basic usage: It is used to revisit an earlier matter or report the status of an inquiry.
  • 先日の件について改めて相談したい。

2. Common pitfalls and similar expressions

• Scope compared with 事件
  • 件 can refer to an ordinary inquiry or item of business, while 事件 refers to a particular incident or affair.