Japan's isolationist policy, known as Sakoku, was implemented in 1633 and lasted until 1853 when the country was forced to open its borders by the United States. The policy was driven by a desire for control, autonomy, and a fear of outside influence. One of the primary reasons why Japan closed its country was due to the threat of Christianity, which the government saw as a threat to their power. The Tokugawa Shogunate also wanted to create a self-sufficient society that did not rely on outside trade or influence. While it had a significant impact on Japan's development, it also led to the creation of a unique and self-sufficient society that is celebrated to this day.