Sometimes Fallout 4 mods can be simple, but just as effective.
If you take Dogmeat with you everywhere you go in Fallout 4, loved Okami, and want to have the natural blend of both, look no further.
Nexusmods member Ammyeh created a re-texture for Dogmeat that makes it look like the white wolf from Okami. It's actually a very decent texture and well wrapped, even though it kinda of looks out of place in the game's yellow-tinted, mostly colourless wasteland.
You can download it from here.