It's official...the Zelda series is dead in Japan.
According to VGChartz, PH has sold only 770,000 copies in Japan. For a Nintendo made DS game that's very low, and it doesn't seem to be selling too much anymore. (I think it'll only sell like 150,000 or so more in it's lifetime)
I hope Link's Crossbow Training isn't Nintendo's answer to poor Zelda sales in Japan...
Top 3 favorite games: Super Mario Galaxy, The Sims 2 (PC), The Legend of Zelda: The Wind Waker