Oh i did saw your scenario, very interesting synposis as ever. Yes Japan again. Well i would assume that peace of any sort between Germany and USSR could possibly mean restarting of the ground communication line with Japan? So they could get some actual tech in 1943-1944, rather than being sunk in subs, maybe even actual hardware like some hundreds of tanks, aeroplanes and so on, not to mention whatever resources the germans could spare. Also the good old question of oil again. I wonder how feasible is for the germans to give Japan at least some oil from the Caucasus, through the rump USSR state of course (and for a "small" fee). On the same theme, also wonder if those Caucasus oilfields can be bombed from ME, and if the US and UK could try a ground offensive against them. UK and France had in plan operation Pike in 1940, that may well be revived in 1943. So you could have the campaign against the Caucasus oil instead of Ploiesti, this will force the germans to have a sizeable troop presence in that region especially if the US and UK try something on land.
One other aspect is that the germans would still need some troops to guard the "Lebensraum" borders in the east and control the territory, the smaller allies could provide a good portion of the troops, but still the germans need to divert some for that as well. But even given all this, the germans could still have about 2/3rd of the OTL forces engaged in USSR to be available for other fronts, namely Italy, possibly North Africa and ME and in France.
Back to Japan, even with the kind of help they could get from the germans i'm speculating they are still in a very serious war situation, so i still expect the US to gradually push them back, if maybe slower compared to OTL. It might be possible that they might use the atomic bombs to try and finish Japan asap (being seen as "weaker" of the two) and concentrate on Germany afterwards. On the other hand, another possible scenario is for the UK to PULL BACK some more troops from Asia to protect the homeland if the USSR is out of the war, and both the UK and US to concentrate on Germany with all they have, only maintaining a kind of stalemate in the Pacific.
This could go in so many directions.