Here is the week 40 update in terms of the two big consoles in Japan's path to be able to reach the commonly stated (in these sales threads) estimates for 2018 sales (2 mil for PS4, 4 mil for Switch) .
TWS - This week's sales
GD - Goal differential, the difference between the average week needed from last week compared to this week's sales
YTD - Units sold in 2018 so far including this week's sales
AWN - Average weekly sales needed to reach the estimate for the console.
Slight Switch bump and big PS4 decrease this week. Both systems are rapidly increasing their AWN and I think it's getting truly out of hand. Next week should prove more interesting for the PS4 as we'll see what bump if any there is for the PS4 pro pricecut.