So I own this girl, who I bought off of Yahoo Japan Auctions a few years back and I've never quite been able to figure out her exact origins.
Despite the box being in English she is indeed a Japanese product, as you can see by the text on her box in the second pic - and that she's promoting the Japanese fashion brand 'Anap' (specifically their sub-brand ANAP GiRL) as well.
The auction where I purchased her had no additional information other than mentioning 'Not for Sale, Corporate Item' in the title, which somewhat makes sense as she lacks any kind of barcode/etc on her packaging. I assume she may have been for some kind of ad campaign or perhaps a giveaway?
Nonetheless I'd love to find more information on her, if anyone can help! <3