Japan still skews physical, and Playstation 1st party games skew even more physical (as we know from UK). I don't buy that digital sales are somehow magically saving the statistics for Sony. Even if we assume 50% digital, the entirety of Sony first party sales was still below Microsoft (since Minecraft also has approximately 30% digital sales on Switch).Sony's digital ratio has increased overall vs. PS4, it's something around 80%. When you see sales of the games on the UK sales charts, those only account for a percentage of overall sales, no reason it's vastly different in Japan.
And again, if PS5 software sales are so bad in Japan (going by only the physical sales charts), and we're going to ignore PS Store, PS+ etc., then Xbox software sales must be catastrophic by comparison because virtually no Xbox Series software appears on the Famitsu charts. By that notion, system sales might not mean anything because what's to say most of those aren't just be distributed to other locations and sold there via scalping, especially Series X units? That's actually one of the theories people've ran with to describe PS5 hardware sales vs. software sales in Japan: most of them were just be bought for scalping.
If it's a ridiculous idea in the case of PS5, then that should also be a ridiculous explanation for describing Xbox Series hardware sales vs. software sales. Unless, again, someone decides to pivot to GamePass, at which point we're right back at the start because folks can't just pretend PS Store & PS+ don't exist in Japan and could have similar influence on buying habits for PS in Japan as GamePass does for Xbox in the same country.
Btw, 60% of Xbox Series consoles in Japan are digital only. Only 15% of PS5 consoles are.