The actress in question is a Japanese comedienne named Shizuyo Yamasaki, commonly called "Shizu-chan." She's part of a comedy duo called "Nankai Candies" and also played a supporting role in "Hula Girls." We figured she must be a celebrity of some kind and not just the first person who fit in the apron.
As for the commercial itself: there are stills at Inside-Games, but no video yet. We pretty much get the idea anyway. Cooking Mama 2 is fun, whether you're a child or Shizuyo Yamasaki.