From June to last month, at Nippon Steel's steelworks in Chiba Prefecture, where the poisonous cyanide leaked one after another, cyanide exceeding the standard was detected so far, but it was not reported to the prefecture. I understand.

Nippon Steel apologized for the inappropriateness of this response, which had been going on for at least three years.

At the "Nippon Steel East Japan Works Kimitsu District" in Kimitsu City, Chiba Prefecture, from June to last month, cyanide, a poisonous substance that exceeds the standard, was detected one after another from the drains facing Tokyo Bay, and the prefecture entered. I am being tested.

Chiba Prefecture says there have been no reports of health damage so far.

In response to this, Nippon Steel inspected the results of past water quality tests, and found that it detected 39 times, including cyanide exceeding the standard, in the three years until April.

In some cases, even though cyanide exceeding the standard was once confirmed, only the results of retests that did not exceed the standard were recorded.

Although it is not legally required to report the results to the prefecture, Nippon Steel did not report all cases, saying it was "inappropriate."

Cyanide is contained in the water used in the blast furnace, and it seems that it has flowed into the drainage facility due to equipment troubles in the facility, so countermeasures have already been taken.

Junichi Tani, director of Nippon Steel East Japan Works, apologized at a press conference, saying, "I am very sorry for causing concern and inconvenience, and I take it seriously. I would like to improve the handling of data and work to prevent recurrence."