A Soviet treaty allowance could change Japanese and German planning

Would a Soviet allocation under the Washington Naval Treaty make Japan consider alternative acquisition strategies?

The main consequence proposed is a stronger Soviet fleet that Japan and Germany would have to account for in their plans.

A recognised treaty allowance would give the Soviet Union an incentive to build up to it. The counterfactual therefore points towards a stronger fleet than other powers otherwise expected. Japan would have to consider that Soviet strength when planning an attack on the United States. Germany would likewise have to give the Soviet Navy more weight in its own calculations.