So does this include Steam sales then? I haven't been keeping up but I remember last year when they announced sales for Naruto, the site said Steam numbers weren't included.
Namco is a bit unusual in that they break up their SKUs in their financial reports in an unusual manner. However, this wasn't a financial statement, so it's much more likely it's included than it isn't, since there's very little incentive to announce total sales excluding them when you're not specially categorizing revenue in a financial breakdown.
As a bit of insight, I can confirm at least in the US that the PS4/XB1 SKUs sold a lot better than the last gen ones. However, I feel the biggest driver of the game's success was by far the design change where they essentially added a Destiny/PSO/etc type loot and questing framework (very popular in the West) to the game along with the kind of strong character customization system you would expect of such a game.
In general, having success in the West is a matter of having game design that matches the taste of Westerners, an art design that doesn't immediately repulse people, and yes, also being on platforms they actually play games on.