はいご背後haigo
1.

The area located at the back or behind an object or person, often referred to in contexts suggesting movement or action from that position.

2.

The hidden or underlying aspects of a situation that are not immediately visible, typically implying a connection to deeper or more complex relationships or influences.

Example:

「びっくりさせないでよ」と彼女は彼が背後に近づいた時言った。

はいごかんけい背後関係haigokankei
1.

The connections and influences that operate beneath the surface of a situation, often hidden from immediate observation.

2.

The underlying context or relationships that shape the circumstances of an event, which may not be readily apparent.

3.

The interplay of factors and associations that exist in the background, impacting the outcome of a specific case or incident.