Where did 1up get these japanese numbers and are they reliable?

[Dolla Dolla]

Famitsu numbers till the end of 2007.

Edit: Up to Dec. 23, 2007, actually.

From article:

First, let's check out cumulative hardware sales for the platforms in Japan. They are (as of December 23, 2007) as follows:

DS - 20,916,560 units
PSP - 7,377,329 units
Wii - 4,456,959 units
PS3 - 1,623,671 units
Xbox 360 - 539,143 units