Japanese goal would not have been advance through Siberia towards Moscow. They would have just grabbed everything on the Pacific coast. Taking it back with troo

Japanese goal would not have been advance through Siberia towards Moscow. They would have just grabbed everything on the Pacific coast. Taking it back with troops being moved from European USSR by 1 rail link.. would be an impossibility. Russian Winter is all well and good but there piles of what iffs that would have won Germans the war earlier. It was a very very close thing and knowing from inside that Japanese will not strike was of massive value