suggest was one main success of the Tokugawan policy of Sakoku and one main weakness/failure of the same policy?

One main success of the Tokugawa policy of Sakoku was the stability and peace it brought to Japan. By closing off the country from foreign influence, the Tokugawa shogunate was able to maintain control and prevent the spread of Christianity, which they viewed as a threat to their power. This policy allowed for a period of internal development and cultural flourishing known as the Edo period.

However, one main weakness of the Sakoku policy was that it left Japan technologically behind the rest of the world. When Japan was forced to open its borders in the mid-19th century, they were far behind in terms of industrialization and military technology. This made it difficult for Japan to defend itself against foreign powers and ultimately led to the end of the Tokugawa shogunate.