Jimbo,
I thought we already settled this one: Wikipedia takes no position on whether the "East Sea of Korea" should OR should not be called "Sea of Japan".
In fact, there's an article which details the history of the dispute, including the current South Korean campaign to make encyclopedias and mapmakers give preference to the "Sea of Korea" form.
Our encyclopedia has the unique policy of being "neutral" rather than "objective". If someone wants to edit the image of the map in question and place East Sea or East Sea of Korea in parentheses, that's fine. Just to indicate that the term is disputed.
But if this is an effort to make Wikipedia RECOGNIZE Ms. Yang's preference as taking official priority over the alternative, I think a polite refusal is in order.
Ed Poor