Because it was against the best interests of the Japanese and Soviet governments, I feel that if the pact should be only this.
“If Japanse units are in Soviet territories, or vice versa, the offending power may only collect one national objective bonus this round.”
This doesnt hinder either side millitarily, it only represents the reluctance of each nation to fight eachother.
Or something as similar as a negitive national objective for the pact…because attacking russia was NOT a Japanese National objective, nor was attacking japan a sovied objective.
Japan: -5 IPCs to fund your war effort in tundra conditions as long as you have units in originaly controled Soviet territory.
Soviet Union: -5 IPCs to fund your distant war effort as long as you have units in originaly controled Japanese territory.