noun
reverse side; back; other side; behind the scenes
Refers to the opposite or hidden side of a physical object, or figuratively to the hidden aspect of a situation. The figurative use is common in news and business contexts.
コインの裏側には鷲の絵が描かれている。
An eagle is depicted on the reverse side of the coin.
この事件の裏側には複雑な事情がある。
There are complicated circumstances behind the scenes of this incident.