Give me one reason why tokugawa ieyasu decided to isolate japan from the outside world.

Outlawed Christianity and forced Europeans out of Japan, all of Japan ports were closed to foreigners

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.