When does Sony reach the point of no return in Japan?

[albionus]

PS360N64PSXBOX said: PS3 numbers need to be paid attention to also, if they go up over last month, and they will, the PS3 is fine.

How could they not go up with such a low starting point? Then again I recall thinking that when the PS3 hit 30k a week in Japan, it bounced up to 40k that's expected, until it promptly fell below 20k.