Sorry, as to the oil supplies to Japan thanks to the Italian tanker fleet, I don't think you have taken into account the distances involved in your calculations. Actually I'm pretty sure about that, since you did not address the issue of where the oil comes from, so you can't have calculated the distances from the sources to Japan.
Actually I did. Do the math yourself if you don't believe me. As for where the oil comes from, well lets see. The U.S., the Middle East, the Soviet Union, and the Dutch East Indies.
I'm also growing tired of your continuous avoiding answering to the other issues I raise. Who's going to provide the oil? How are the Japanese going to pay for it? If the Italian tanker fleet is dedicated to this task, who will carry oil to the Italian colonies? And so on and so forth; ignoring these problems with your far-fetched idea won't dispel them.
See above and it would be quite obvious if you would think for a second.
Likewise, I pointed out to you the whole larger issue of raw materials the Japanese lack and simply can't be bought from neutral countries, since they were produced only by the USA or by countries that had no reason to be friendly with Japan or by countries that, being at war, needed the strategic materials for their own effort.
And your point? Italy is a neutral nation engaged in legitimate trade with friends by buying supplies for them. FDR can not close trade to them without justification.
And your answer is… "the Japanese aren't dependent on trucks"? Do you mean that the very sizable land Japanese forces mired over an enormous Chinese territory had no trucks? Or do you mean they can let their trucks rot due to lack of tires and use only trains and draught animals, thus further degrading their capability of effectively countering enemy operations?
Well lets see, the IJA has some 14,000 motor vehicles of all types, 9,000 of them in Manchuria. They relied mostly on Pack Animals to get around in the rugged terrain of China. Even then their dominance is largely fictional like that of todays U.S. Army in Iraq. Where they are they rule. Where they aren't warlords rule.
Besides, trucks were just an example. You don't believe rubber only goes in soft-skinned ground vehicles, do you? Can the Japanese replace all their land and carrier-bases aircraft with seaplanes, so that they won't need rubber for the landing gears? What about the other uses for rubber, such as in tanks? Artillery gun wheels? Sealings? Home industries?
Japanese Artillery didn't use rubber tires, they used steel wheels, which makes sense for the rugged terrain they were used in. Tanks are rare and mainly used as a pillbox. Their rubber usage is rather low. Again, Italy can buy the rubber for them from Britain until the German's send specialists to show them how to make artificial rubber which they did in early 1941.
What about the other scarce raw materials?
Again Italy can buy them for Japan which makes sense as Japan uses mostly other Nation's shipping to supply them with the Industrial Materials they need and they pay well.
As to the strategic bombing, you are putting forth platitudes about the workforce and old myths about the 8th Air Force. The figures tell a different story. The Goehle-Werke factory of Dresden was away from the bombed-out areas. Yet two weeks after the worst bombing on the city, its workforce was down from over 4,000 men to 2,000. That's not going to have an impact on the production? Neither the British nor the US bombs had hit the factory, yet the area bombing had cut the output by 50%. The Ica-Werke factory went from 2,800 to less than 500. The Zeiss-Ernemann from 2,500 to 600. A profound effect, I'd say.
And did I make the claim the area bombing didn't kill the workers? No I claimed it was more effective to hit the factories where the output is comming from and to knock out the management.
As to training new personnel for industrial tasks, sure, you are right, it's quick and cheap – because you are making the mistake of counting the costs and time starting from a ready and willing and unemployed grown-up, basic-educated worker. Which is not the case with Germany at war.
How so? Please enlighten me.
As to the 8th Air Force reigning supreme in inflicting well-aimed damage onto Germany, it's time you learn some hard facts. In the final 4 months of 1944 the 8th Air force measured its accuracy as, under the best conditions, 82.4% of bombs within 1 mile of the aiming point. Under the worst conditions 5.6% of bombs within 1 mile of the aiming point. The best conditions were obtained on 14% of the raids, the worst on 35% of the raids. I repeat, this is an analysis by the involved unit itself. It means that in one raid out of three, they managed to place one bomb out of 20 within one mile of the target. So much for the usual claims.
Did I claim the 8th had precision guided weapons (We did build TV Guided Bombs in that time frame though)? No I said their accuracy was better than the RAF's seven kilometer circle in which half their bombs failed to hit as reported to Churchill by his own fact finding team in 1941. A seven kilometer circle is a far bigger circle than a one mile circle.
As to the commitments of the Royal Navy, not one of the factors you mention was absent in OTL, while on the other hand at least one or, according to your wishes, two of its major enemies are neutral in this ATL. Insisting that this does not free very significant Royal Navy assets is weird.

Well then the USSR doesn't exist anymore, but we still maintain significant forces in Europe, the Japanese Empire no longer exist and China and India's navies are not a threat to us and neutral, yet we maintain powerful surface fleets in the Pacific instead of in the Gulf where we are fighting and actual war.
We do it because it reminds those nations to play nice. Same concept here, the British have to maintain its current forces where they are to deter others from getting ideals, fight pirates, and escort convoys.
As to the three battleships I mentioned, they were, just like the Japanese trucks, only an example. Should I list all the warships sunk by Italians, Germans in the Med, and Japanese? In any case, battleships are very handy when it comes to coastal bombardment, which the British did in OTL and will do in this ATL.
Did I claim they would be sunk? No I questioned their ability to affect the strategic situation. Bombard the shores of France? Okay and you accomplished what precisely?
As to the Germans not even registering British attempts to hit them, sorry, but the figures I quote, which you keep ignoring, give the lie to your assumptions. Read again the previous message; learn how many divisions the Germans were keeping in the West as of June 1941, when they began their most momentous win-or-die campaign. They were there for one reason: because Britain had not thrown the towel in. After the Vaagso raid the Germans increased the size of their Norwegian garrisons and even deployed a panzer division there! Through to the end of the war, Hitler expected a British move up there! They were registering that threat, even when it was only a threat-in-being, and this removed forces from the main front.
They left an occupation force in France, no big deal, that was about 51 divisions, compare to 38 divisions in Germany itself, 8 in Norway, without Italy in the fight that frees up 17 divisions, then we have 93 divisions in Russia and three in Finland. Next month we get 40 divisions in France as ten divisions were pulled to the east along with 34 divisions from Germany itself.
Here is the breakdown at
http://www.axishistory.com/index.php?id=7288
Do the math and bear in mind a German division averages about 9,000 men.
As for Norway only because the U.S. entry convince Hitler Churchill was serious about invading Norway. Without the U.S. involvement that threat is simply not credible to Hitler.
This of course as to the naval-land threat. On top of that, there was the diversion of resources, aircraft, guns and men for countering the strategic bombing campaign. Read Speer's take of the Hamburg bombardment to see whether he registered it and whether he judged it "a feeble attempt".
And did I challenge the human costs, no I challenged material costs as Britain got lucky with this strike in that a lot of factors went their way. If their new jamming system failed, the German night fighters would have dispersed their formation before they could drop.
Further without U.S. involvement this effort can't be done as Britain doesn't have the resources to pull it off.
As to the continuation of the Yugoslavian theme, it's finished. The point was that Yugoslavia can still have its coup in this ATL, even without a British landing in Greece. It's not in its best interests, but Yugoslavia didn't necessarily pursue its best interests in OTL. Now, of course the British may or may not be able to exploit the obvious German reaction. But in this ATL, the best German interest would be served by a continuous belt of neutral states protecting the south-eastern flank of Europe: Italy, Yugoslavia, Greece, Turkey. A hole in this shield provides the Allies with a place where they will not be violating a neutral's air space when they go and bomb Ploesti, and plant sea mines in the Danube, in the first place. And possibly, later on, with yet another place to land. Even if they don't land there, they can drop supplies to the partisans, threaten a landing, and thus divert German forces there.
Or Greece and Italy step in to prop up the current regime. They aren't fighting and neither wants an unfriendly regime to their North or an excuse for the Germans to jump in and the Germans are closer than the British. So Yugoslavia is a deadend no matter what.
As to the Japanese plans, the writing was on the wall. The Japanese had been planning their go-South move for years by then, and you don't grab Indochina for naval and air bases if you are just a peaceful good-faith businessman on the world's market for peaceful purchases.
Did I claim they didn't? No you are reading something completely different into what I am saying and planing does not mean it will be executed as for French Indochina, the IJA took advantage of French weakness and the French still ran the place administratively. What the issue is, is how effective can a trade embargo be when another nation ignores it by serving as a middle man for the nation being embargoed and the embargoing nation can not stop it.