So of the main companies and excluding Microsoft consoles the PS4 is the worst selling platform in Japan ever?
You didn't include the PS1 and the PS2 but I'd image they did a whole lot better anyway.
Well, I knew it was bad but not that it was that bad. WiiU isn't exactly doing much better. I think PS4 will turn it around a bit though. It won't end up in the top of course, but it will at least beat consoles like the Saturn, the Dreamcast and the WiiU. In any case, home-console gaming in Japan is probably sadly beyond repair.