Why does any of this not count?
He didn't say "We will make every game multiplatform between Microsoft, Sony, and Nintendo platforms."
Not that it does not count, I am merely clarifying that by going multiplatform, they don't mean releasing it on every possible system that can handle the game in one way or another. To self quote:
I suspect by mutiplatform, he means being present on different platforms in different ways for catering to different tastes. Surely he is not thinking DQ9 selling 5m was little because it wasn't multiplatform.
Basically, he doesn't mean that if the next DQ is a handheld game, it will come out on 3DS and for sure Vita and other possible mobile platforms. However, if it is an MMO, it will come out on every viable system that will provide crossplay. If it is a single-play console game, depending on the sale of X1, it may still come out only as PS4/PS3, or as PS4,X1,PS3,360.
But also importantly, it means they are not going to just make handheld DQ mainline games, and make console games MMO, or not make Vita exclusives at some point, etc.
Exclusive means only on one platform. CC is an old ass psp game. It doesn't say anything about the current strategy at the company. You might as well bring up FFXII on the ps2. That was released around the same time.
Type-0 was also PSP exclusive. It hasn't even been localized yet.