The debate on diversity began after the Academy left out black actors in the main categories of 88th Oscar Awards nominations.
Inarritu, who won his second best directing Oscar for "The Revenant" yesterday, in a backstage interview said the discussion should be much more than just blacks and whites as diversity includes other races and communities too.
"I want to say, which is something that is absurd. I think the debate is not only about black and white people. I think diversity really includes -- you know, what's that mean? That now is Oscar so brown or what? I think we are yellow and Native Americans and Latin Americans.
Inarritu believes there should be a proper platform to hold a sensible discussion about the people of colour and their issues.
"What I am super impressed about is that still we are dragging this tribal thinking with this. I think one of the problems that we are suffering is there is no moderate platforms to talk about something deeply, very important, that in a way it's deciding the destinies of people around the world -- not only here -- by the color of their skin.