Strelok, I don't know what you're smoking but you've gone from plausible alternate history to fiction. Remember that the "moderate" Tōseiha clique in the army held control ever since the 2-2-6 coup was crushed by the emperor. Had the Tōseiha clique been crushed instead of the Kōdōha by the emperor (unlikely, as the emperor's court favored the Tōseiha), then Japan would have struck north against the Soviets. Considering both army factions wanted expansion, collision with US interests is inevitable, especially since the dutch east oilfields is a question of when, not if. The only real way they don't push China at some point is if the civilian "democratic/liberal"
faction manages to get rid of both cliques (even MORE unlikely). And if that happens, well, Chiang's going to go after Japan in 1945 (That's when they thought he would have finished the "modernization" of China)
Japan in the 1930s is calm on the surface, but eerie close to a civil war. The fact Hirohito managed to navigate and play all sides to suit his preference of the strike south idea is quite the feat. Some may argue that he was forced into it, but I would argue they wouldn't even bother and forcibly abdicate him in favor of his son, Yasuhito instead
If we talk a about a strictly plausible realm, Zhukov's appearance is not strictly necessary, there are other "great" generals in the USSR like Konev, Tukhachevsky, Shaposhnikov, Vasilevsky, Rokossovsky, Malinovsky, Varfolomeev , Isserson among others (I note the latter two for their theory contributions).
The 2-2-6 incident happens in Feb, 1936, the first Moscow Trial is in August of 1936. It would be plausible that Stalin decides to not purge the military if it becomes obvious that both Japan and Germany will be enemies.