Nov. 8 -- it has been eight years since the fukushima nuclear accident. The treatment of nuclear sewage has long been a concern because of concerns about public safety. However, in a recent investigation, the Japanese authorities found that the fukushima daiichi nuclear power plant had 40 holes in the water, raising questions about the follow-up regulatory mechanism.

A final accounting report released by Japan's accounting watchdog showed that 40 holes, including cracks and weeds, were found in the protective layer of contaminated water at the fukushima daiichi nuclear power plant, jiji news agency reported Wednesday. The agency argued that this could increase the risk of nuclear contamination of water and demanded proper management from tepco, the company in charge.

The plant has sprayed the ground with mortar and other protective materials to prevent water from seeping into the reactors and other facilities. During the inspection, which was conducted between 2013 and 2017, 40 cracks and weeds were found in alarming conditions.

In response, tepco said, "it is a pity that the maintenance management has not been properly carried out. In the future, the maintenance will be well checked and planned."

It is understood that the fukushima nuclear power plant has a number of contaminated water leakage accidents. In 2013, tepco workers found two small cracks in the bottom of storage tanks at the plant where highly contaminated water was leaking out.

In 2014, about 200 tons of contaminated water leaked into the basement of the fukushima daiichi nuclear power plant after a pump that was not normally used was turned on. (From CNNPN)