Final answer:
The Japanese government banned Christianity in 1587 due to concerns about foreign influence, disloyalty, and destruction of Buddhist temples. Tokugawa Ieyasu continued the ban and implemented isolationist policies to protect Japan from outside influences.
Step-by-step explanation:
In 1587, the Japanese government, under the rule of Toyotomi Hideyoshi, banned Christianity in Japan. Hideyoshi initially tolerated Christianity but became convinced that it posed too many threats to traditional Japanese practices and his consolidation of power. Some of the reasons for the ban included the fear of foreign influence, the perceived disloyalty of Christian subjects, and concerns about the destruction of Buddhist temples by zealous converts.
Hideyoshi's successor, Tokugawa Ieyasu, continued to enforce the ban on Christianity and sought to isolate Japan from the rest of the world by banning the entry of foreigners and restricting Japanese from leaving the country. The shogunate feared that Christianity could be used as a tool for foreign powers to gain control over Japan.