Japanese Siberia?

What would the effects be if the Japanese decided not to withdraw from Siberia? Would it mean that the IJA will be prioritized over the IJN? Other than the predictible Soviet hostility, how would the other major nations react?
 
You don't specify a timeframe, but I presume you mean in the period leading up to WW2.
The usual problem with ideas like this is working out why the Japanese decide to go after Siberia instead of the resources of Southeast Asia, and in particular the oil fields. Yes, we know now that Siberia has a good deal of oil... but they didn't know it then. More importantly, those resources can't be extracted without techniques that were developed in the 1950s IIRC, making them inaccessible even before considering the extreme conditions involved. Without that, there's nothing for the Japanese in Siberia that they can't get more easily elsewhere. So why do they decide to prioritise it?

Once we know why they're there, we can make some sort of guesses about how they might go about trying to achieve those goals. That will in turn inform speculation about how others will respond.
 
I should have been more specific, this is about what if the Japanese Siberian intervention didn´t end in 1922 as OTL. So this isn´t a question about Siberia or South east asia.
 
Probably not too much different from OTL.

By the time that Japan withdrew, its influence was confined to the Maritime Province. Japan's major clients among the far eastern warlords were either exiled (Semenov) or dead (Kalmykov and Ungern-Sternberg).

The time for Japan to influence the outcome of the civil war had already passed by 1920. The white Russian regime ruling the Maritime Province thereafter had too few resources to expand against the Russian's own puppet regime in the Far Eastern Republic unless Japan did the fighting. Overall, its presence on the coast gave Japan a foothold on the mainland, but it soon gained another one in Manchuria anyway, so the one in Russia shouldn't have mattered too much.

The western powers didn't trust Japan's intentions in the far east (which was one reason the US sent troops there in 1918), but since they did nothing effective about Manchuria and didn't like Soviet Russia either, they would probably have stayed away.
 
Would the Soviets annex the FER or would they let it be another puppet? As I understand it a number of Zaibatsu invested in the area but I am not clear on what they were investing in. There were also as I understand it alot of settlers, would that have benn accelerated?
 
The Soviets created the Far Eastern Republic as a buffer between Russia and the Japanese, and the rulers of the Far Eastern Republic understood that. Once the Japanese left, the Russians reabsorbed the Far Eastern Republic with the acquiescence of its government. If the Japanese don't leave, I'd guess that Russia would eventually decide that the policy wasn't working, and take over the FER anyway.

Sorry, I don't have any knowledge that would let me answer your other questions.
 
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