Open the Kimono means revealing the inner workings of a project or company to a prospective new partner.

打开和服指的是向未来的新合伙人披露某一项目或本公司的内部运作情况。

It is said that the term probably can date back to feudal Japanese times. Warriors or adversaries would open their kimonos as a gesture of trust to show they had no hidden weapons. By this definition the term describes establishing trust in a business relationship.

据说这个词可以追溯到日本的封建时期。武士和他们的对手都会打开和服，以示自己没有隐藏武器。现在这个词描述的是商业关系中信任的建立。