Had Germany and Japan coordinated their military campaigns . . . Japan attacking Russia in 1941, for example, instead of the US, and then coordinating a campaign to threaten British possessions from Southeast Asia to the Middle East . . . then there is some chance that they might have eventually been a threat to America. But it's hard to see how that could / would have played out.
It's interesting to think how this might have played out. Sure the Japs could take Vladivostok and then some, and then what would they do. It's a long walk to Moscow, with not enough goodies along the way. Imagine the Germans sending a message "We need you guys to commit a few million troops in Siberia so that we can take Moscow, etc."
Since the Jap tanks sucked, it probably would have been an infantry war with some trucks and horses, etc, and plenty of jap aircraft. The terrain is so remote that trench lines would not be a prominent feature, and concentrated artillery would have a minor role. Both Japs and Ruskies would feed the human meat grinder with little gained. Occasionally a new Russian tank would inflict serious losses, but the Russians would not have enough tanks to fully exploit this with Germany breathing down their neck. Japs would eventually get good at tank warfare, but the first couple years would be terrible.
This scenario could definitely tip the balance in favor of Germany, but I can't see how it would benefit Japan. How do you like the prospect of freezing to death in a land that was considered unhospitable even before the Ruskies scorched it? Or maybe the Japs would just take the Russian far east and then switch to a defensive posture, that is more plausible. Even then, Japan would have to postpone offensives in southern China, India, and Australia because too much of their army would be tied up. These three targets look much more appealing from the Japanese perspective.