Famitsu reports : Nearly 500,000 for Metal Gear Solid 4 in Japan.

[TheBigFatJ]

Wow, the same people seem to have bought MGS 4 as MGS 2 and 3 in Japan.

HW boost was pretty small -- it will probably be above the Wii for one week in Japan now. I would expect it to drop back to the sub 10K level again very soon.