What was one of Japan's main concerns?

Waste management. Japan burns close to two thirds of its waste in municipal and industrial incinerators.  

Climate change. Climate change in Japan is already affecting Japan, and the Japanese government is increasingly enacting policy to respond.

Nuclear power

Fishery and whaling

Urban planning

Explanation:

the doctrine of nullification recommended that states living inside the union have the one-sided, inalienable ideal to void any law made by the national government that could be esteemed illegal.

the united states was shaped based on a general agreement among its individual states. hence, it is inferred that under the hypothesis of invalidation, since the states are the establishment of the union, they have the ability to referee and disprove unlawful laws.