Which explains the decline of japan’s isolationism?

The immediate reaction of the Japanese people to end the isolation was to be angry and they saw it as a sign that the Shogun was weak, causing a civil war. There were also external pressures that led Japan to make the decision to end the isolation, as: many countries wanted to trade with Japan, Commodore Perry and the United States offer promises. Also internal pressures such as: natural catastrophes that make rice scarce, causing hunger and death with riots in the city.

this is a good question! i'll do some research and come back when i have the answer!