One, it wasn't moderate, only if compared to the PS. Two, you're speaking as if SOJ, SOA, and SOE are all the same company. If you want to throw them all together, they probably lost money in the 16-bit days as well due to the black hole that consumed the Mega Drive. I was referring to the: Dream Eye, Dream Karaoke, etc.
Did you see any of them releasing a console on their own? no, did they all go down at the same time? YES, ergo it's the same damn company. And thats why I mention the PS, because it WAS moderate compared to that console's numbers.
For the record, none of them went down as they are all still around. And not that it matters, but the unreleased Neptune was an SOA creation. But even w/o that, no, they're not the same company. One company cannot be domiciled in three countries. Not those three, anyway. They are foreign branches of a Japanese company. They've all got their own books, P&L, you name it. One can very easily go down while the other two flourish (and vice versa...Tower Records is a prime example). You think profits are shared between regions? You only asked if the Saturn's J-success was enough to compensate for the failure in the other two reasons. PS has nothing to do w/ it. The Saturn in Japan was a financial success. A notable one. Whether it made up for the losses elsewhere... who knows.