In the latest jab at perennial foe Japan, Pyongyang has blasted Tokyo over its alleged "nuclear weaponization" just days ahead of a second summit between North Korean leader Kim Jong Un and U.S. President Donald Trump.

In a commentary published Saturday in the Rodong Sinmun, the official newspaper of the North's ruling party criticized what it claimed were "voices for the revision of the constitution and increased military spending and nuclear weaponization" from within the administration of Prime Minister Shinzo Abe.

The commentary said that under Abe, Japan "can go nuclear anytime after giving up 'three non-nuclear principles.' " Consequently, it claimed, "peace in the Asia-Pacific region will be exposed to a great danger."