The end result was that the Japanese failed to use their numerical and material superiority in the first 2 months of the conflict, and then got utterly annihilated when the soviets got numerical superiority. If that's not a crushing victory, I don't know what is.
Then you don't know what is. It's been discussed earlier on but given the political goals of the Japanese not being the destruction of Soviet/Mongolian forces but pushing them back to their side of the border, and the aforementioned massive advantage the Soviets had, the Soviets performed extremely poorly. It was a victory, sure, but not crushing. Bagration was a crushing victory, Khalkhin Gol was Pyrrhic.
Translation: the Japanese would not have the initial material and numerical advantage they had in the first 2 months of Khalkin Gol, would be attacking prepared positions, and the Soviets would be well supplied from the start.
Prepared? Yes. Well-supplied? No, especially if the Japanese wait a few months after Barbarossa starts so Soviet supplies, men, and equipment will be directed west.
Also, as has been covered earlier in this thread, the IJA OTL had an advantage of at least few hundred thousand men over the Soviet Far Eastern Theater up until 1943. This advantage would certainly be expanded upon, as would a material advantage, should Japan shift its focus northward (which, as established earlier, would most likely happen sometime around early 1936 or late 1937).
Combine this with the fact that the Japanese would have to move a mere 50km from their norther border to cut the trans-Siberian railroad (less than that to cut it, but to cut and safely occupy we'll go with 50km), they really don't have to push far to put the Soviets in some serious hurt.
They held the field and achieved their goals, trying to claim it wasn't a victory is just your blatant bias showing itself.
They didn't hold the field on the Japanese side of the border, and the conflict ended politically, not militarily (the Japanese were planning a counterattack). Also accusing someone of bias without showing any evidence thereof is bad form, not that these forums have given me expectations of the contrary
which suggest that in terms of numbers of soldiers the Soviets didn't have such an advantage.
Now alone this source may simply be wrong, though it seems well documented but when combined with how the Japanese reacted it certainly is possible that the skirmishing and battles in the far east were in fact a great Soviet victory.
What is certainly clear is that it was a Soviet victory, whatever you might believe and be it a costly one for the Soviets or one no more costly to the Soviets then to the Japanese the victory was convincing enough to banish the thought of going after the Soviet Union from Japanese minds.
The Soviet advantage was almost 2:1 in soldiers over the course of the battle, but the real disparity was in terms of equipment, including a 7:1 tank advantage and 6:1 truck advantage. The Soviets lost vastly more equipment despite these advantages.
Also, the Japanese not taking on the Soviets due to Khalkhin Gol is a myth. The results of the battle were seen as a sign of material disparity, which the IJA sought to rectify. The reason Japan chose the Southern Strategy was the lobbying of the IJN and the
Tōseiha faction of the IJA holding more influence than the
Kōdōha faction.