A bill that would reduce vote weight disparity to a constitutional level by revising Lower House single-seat districts won approval Tuesday from the Cabinet of Prime Minister Shinzo Abe.

Based on population projections for 2020, the changes would bring the maximum disparity between densely and sparsely populated districts down to 1.999 to 1.

That is just under the 2-to-1 threshold that the Supreme Court has established under the Constitution's guarantee of equality for all under the law.