Taking the assumption that the Nazis defeat the USSR and are in relatively complete control to the Urals, what happens to the east. I would assume in this scenario the war between Germany (and Italy) has ended, perhaps with one of those Halifax scenarios where there is an armistice after France falls. I would posit under these circumstances the UK does not go along with the US in embargoing oil to Japan, the Dutch government in exile can't go along with the embargo given the home country is now beyond redemption and lets assume the Nazis offer a free return home no penalty or POW status for Dutch forces in exile. Similarly Vichy is further empowered and the free French greatly diminished, so similar to OTL you end up with at least de facto Japanese control of Indochina so at this point petroleum, rice, and other important materials are available to Japan.
Under the above circumstances, plus a less cooperative Britain with respect to the Burma Road, Japan can continue the war in China without the need to seize the "southern resource area", so no need for Pearl harbor. US-Japanese relations may suck, but its not war.
The USSR is smacked down, no supplies from the UK or the USA and everything west of the Urals (including all their known oil) gone, it would not be a stretch for the Japanese to decide to take the Soviet Pacific coast and some territory north of Manchuria. This makes the rump USSR basically land-locked, and resource poor (in terms of what is known in 1940s). The area between however deep the Japanese care to go and the Urals. This area is a big empty place with no known value, and I expect the Germans (and Japanese) to restrict their interest in it to smacking any guerrilla concentrations.
As far as the Nazi occupied areas of the (former) USSR, while the colonization scheme will be a long time really working, they can frankly do whatever they want. They have no scruples, and between starvation and outright killings the population of Slavs will drop rapidly. For survivors, the choice is accepting slavery and living and eating, and families surviving, or dying perhaps unpleasantly. In this scenario, unlike slavery in the USA where, for most of the time, slaves were in relatively short supply, here you will have a large population to cull to get the needed number of slaves.
Given the size of the "stick" the Nazis are willing to use, even a small "carrot" will be seen as preferable.