^Once again,nowhere in the manga has it stated that the shinigami is an omnipresent god...all we were told is that he it is simply responsible for the souls of people caught in its grasp..
You're assuming that this thing is omni present..
The facts we do know is that it isn't tangible, and it is a SPIRITUAL thing......It would be completely unaffected by kamui
Though it is spiritual,it can make contact with both physical and spiritual things, just like the two spiritual weapons...
As I said, saying kamui would affect yata, is just like saying kamui would affect the death god, or that it would affect a GHOST..
or that it would affect dan's spirit when he uses his jutsu..
The shinigami has his own realm where the souls are stored... just like inside totsuka there is its own realm where sealed souls etc are stored
OK what is the definition/translation of shinigami?
The GOD of DEATH.
It is spiritual in this realm of the physical and can make contact with physical and spiritual things when in this realm, but when it's not, it is an omnipresent GOD of DEATH.