What was one of the reasons that the tokugawa shogunate began an isolanionist policy in 1636?

One of the key reasons the Tokugawa shogunate adopted an isolationist policy in 1636 was to curb the influence of foreign powers and prevent the spread of Christianity, which was seen as a threat to the traditional Japanese social order and the authority of the shogunate. The shogunate aimed to maintain stability and control over Japan by limiting foreign interactions, thereby protecting its political and cultural integrity from external influences. This policy, known as sakoku, effectively restricted foreign trade and missionary activities, allowing the shogunate to consolidate its power and promote a homogeneous society.