With shortages of Nintendo DS units across Japan set to last throughout January, there's a report via Kotaku that some Japanese stores are reimporting American DS units to satisfy demand.
It is worth noting that the pictures show the blue DS model being offered, which is not otherwise available in Japan, so it's also a possibility the importers are simply selling this unique color — or maybe a combination of both selling points. Nintendo has said will not honor the American warranties on these units in Japan.