Why did China and Japan choose isolationism?

* Tribute system: China had a long tradition of receiving tribute from other nations, which reinforced its view of itself as the center of the world. This system discouraged trade and cultural exchange with other countries.

* Confucianism: Confucianism, the dominant philosophy in China, emphasized social order and harmony. It discouraged individual initiative and change, and made China resistant to new ideas from the outside world.

* Geography: China is a vast country with a diverse landscape, making it difficult to travel and communicate with other countries. This isolation also contributed to China's isolationism.

Japan:

* Tokugawa shogunate: The Tokugawa shogunate, which ruled Japan from 1603 to 1868, implemented a policy of isolation known as sakoku. This policy was motivated by a desire to maintain control over the country and prevent the spread of Christianity.

* Fear of foreign influence: Japan had had negative experiences with foreign influence in the past, particularly with Portuguese and Spanish traders who had brought Christianity and military technology to the country. This made the Japanese wary of further contact with foreigners.

* Geography: Japan is an island nation, which made it easier to control access to the country. This also contributed to Japan's isolationism.

In addition to these specific reasons, China and Japan were both influenced by the general trend of isolationism that was prevalent in East Asia during the 17th and 18th centuries. This was a time of great political and economic upheaval, and many countries in the region were looking to insulate themselves from the chaos.