When did Akiko Mishiro die?

There is no publicly available information about a person named Akiko Mishiro or any record of their death.

It's possible that:

* This is a fictional character: The name might be from a book, movie, or video game.

* The information is private: If this is a real person, details about their death might be kept private by their family.

If you have more context about where you encountered this name, I might be able to help further.