PS4's last week above Switch in lifetime sales, with less than 6k between them.
In fact, since this is for the week that ended 8 days ago, Switch has overtaken PS4 in Japan by now.
If i'm not wrong the 6k difference was for the week numbers we should have gotten on May 1st but that we only got on the 8th due to the Golden Week break. The numbers from last week should already have the switch above the PS4.
With the numbers above, it would put switch at 8 094 337 and PS4 at 8 069 202 for last week (charts we should have gotten on May 8th).