背後

1. Origins, structure, and basic meaning

• Structure: 背後, read はいご, denotes the physical rear of something or a concealed person or force behind an event.
• Basic usage: It covers a physical position behind someone and a concealed person operating behind an incident.

2. Common pitfalls and similar expressions

• Physical rear and concealed background
  • The examples separate the literal rear of a person from the figurative hidden force behind an event.