Here is the week 22 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.
Welcome to one million YTD units sold Nintendo Switch! Solid jump for Switch off of likely the Pokemon Switch announcements. PS4 stays more or less even with no big titles released this week. Still highlights the huge unreliability of Amazon JP as it was indicating a pretty big bump in PS4 which did not surface. Will have to see if the Days of Play sale does anything for next week and if the Switch can continue its current 4 weeks of consistently increasing hardware sales. Unless it does amazing should hit 100k AWN next week.