Who decided to isolate japan and why?

Japan's isolation, known as sakoku, was largely established by Tokugawa Ieyasu and formalized by his successors in the early 17th century. The primary reasons for this policy were to maintain political stability, prevent foreign influence, particularly from Christian missionaries, and protect Japanese culture. By limiting trade and contact with the outside world, Japan aimed to avoid the colonial domination that affected other nations. This isolation lasted over 200 years until Commodore Matthew Perry's arrival in 1853 forced Japan to open up to foreign trade.