Made in Korea
I'm not Japanese, so I'm not sure if the fact that Bae Doona is Korean is relevant to the story. I thought it might be a joke about the quality of the doll, i.e. a cheaper version that comes from Korea.
If you are from Japan, does Bae sound Korean? In the film her bf asks her where she got her Osaka accent from (clearly she got that from her 'owner', Hideo). I wasn't sure whether this meant that Nozomi sounds to the Japanese audience like a person from Osaka, or does she sound like a foreigner who has a bit of an Osakan accent?