事情

1. Origins, structure, and basic meaning

• Structure: 事情 is read じじょう and means the circumstances or situation underlying an event.
• Basic usage: It is used for moving because of family circumstances or learning the fuller background to a matter.

2. Common pitfalls and similar expressions

• Focus compared with 理由
  • 理由(りゆう) focuses on why something happens, while 事情 focuses on the surrounding circumstances and background. 家庭の事情で gives family circumstances as a cause without specifying their details.