"[open] the kimono" の定義と意味

What is the origin of the idiom "open the kimono" and when to use it?

The idiom "open the kimono" originated from the business world and is believed to have emerged in the 1980s. It refers to the act of revealing or disclosing sensitive or confidential information, strategies, or plans. The phrase is thought to have been inspired by the cultural significance of the kimono in Japanese society, which traditionally represents openness and honesty. It is used only to emphasize the act of sharing information transparently and without reservation, often in a collaborative or negotiation context.