DS sells over 30 million in Japan
30 million is indeed a record for the best-selling console ever in Japan; however, every time anyone in Japan buys a DS, it's a new record, because the DS became Japan's best-selling console as soon as it passed the PS2 at around the 21 million mark. There are people in line at electronics stores now, each of whom is about to bring the DS to a record sales total.
[Via IGN]