About 50 people, including fisheries workers, marched through Koriyama City on Sunday.

The demonstration was organized by a group of Fukushima residents in their 20s and 30s, who said detrimental rumors about the prefecture may circulate if the wastewater is disposed of improperly.

Group representative Sato Taiga said a survey shows that most respondents do not know about the issue. He added that he hopes the group’s activities will raise awareness among people, including the younger generation.

Water used to cool molten nuclear fuel from the 2011 accident at the plant has most of the radioactive materials removed before being stored in tanks. But the treated water still contains tritium and some other radioactive substances.

The amount stored has reached some 1.2 million tons. The plant’s operator, Tokyo Electric Power Company, expects to reach capacity around the summer of 2022.

In February, a government panel compiled a report that says a realistic solution is releasing the wastewater into the sea or air after diluting it in compliance with environmental and other standards.

The government is in the process of hearing opinions from local governments and relevant organizations before making its final decision on how to dispose of the treated water.