Final answer:
Japan remained a closed society for almost two hundred years under the closed country policy imposed by the Tokugawa shoguns to maintain control over foreign influence and protect the shogunate's power.
Step-by-step explanation:
Japan remained a closed society for almost two hundred years under the closed country policy, which was imposed by the Tokugawa shoguns from 1633 to 1853. The closed country policy was implemented as a means to maintain control over foreign influence and prevent potential threats to the shogunate's power. It involved severe restrictions on interactions with foreign countries, including limiting trade to specific ports, banning European Christian religions, and enforcing strict codes of conduct.