Answer:
Sea ban by Chinese, Sakoku Edict by Japan and policies of Korea.
Step-by-step explanation:
Sea ban was a series of isolationist Chinese policies that restricting private maritime trading and coastal settlement during the Ming dynasty and in early Qing in China. When the Sakoku Edict was introduced in Japan, Japan closing its doors to all European powers except the Dutch in order to limiting the influence of other nations on the country. The Korea is also restricted the foreigners to trade with them due to sanctions of United States of America as well as their own policies.