When was Keiko Yamada born?

Unfortunately, there is no readily available information about a person named "Keiko Yamada." This name could be quite common, and without more context, it is impossible to find a specific individual.

To help me find the birthdate, could you please provide more details about Keiko Yamada? For instance:

* What field is she known for? (e.g., actress, musician, scientist)

* Is she from a specific country or region?

* Is she famous or a public figure?

The more information you provide, the better chance I have of finding the information you need.