I'm thinking outsource to maybe Team Ninja, or Obsidian (aka the kings of outsourced development).
Team Ninja is a japanese company, so no.
And Obsidian is the king of outsourced development? If this is about New Vegas, it's already been explained to you why they got the game.
As for who it would be, I could see Capcom just asking Ready at Dawn to do it.
Not just new Vegas but Kotor 2 as well.
And Ninja Gaiden wasn't very Japanese. If it were Ryu would've had purdy white hair and his outfit would've been full of useless zippers.
I'll give ya kotor 2, but that's still two games (one of which has a good reason for being given to them), no where close to what I call "outsourcing royalty".
And it doesn't matter if Ninja Gaiden was japanese-y or not (which it very much was IMO, but I don't want to get into a debate with you about that, that will lead nowhere.) It's still made by a Japanese company, which goes very much against a big point of DmC: to be westernized.