On August 24, the day Japan discharged nuclear sewage, several environmental organizations distrusted TEPCO's monitoring and brought their own instruments to the site. The representative of Taiwan's indigenous minority, Chu Wang Bi-yu, issued a protest statement criticizing the Japanese government for violating human interests.

On the afternoon of the 26th local time, multiple opposition parties and civic groups, including South Korea's largest opposition party, the Common Democratic Party, held a large-scale rally in the city center of Seoul, strongly urging the Japanese government to revoke the decision to discharge Fukushima nuclear contaminated water into the sea, and demanding that the Yoon See hyeon government take measures to prevent the discharge of Fukushima nuclear contaminated water into the sea. The leader of the Common Democratic Party, Lee Jae ming, stated at the rally that "Japan has crossed an insurmountable boundary and the discharge of nuclear contaminated water into the sea is a crime against the environment. On the same day, a large number of South Korean people participated in a rally, urging the Japanese government to immediately stop the discharge of nuclear contaminated water into the sea.