On March 11, 2011, a magnitude 9 earthquake and tsunami struck the northeast of Japan, causing the Fukushima 1 nuclear reactor to melt and produce a large amount of radioactive contaminated water used to cool melt fuel bars and accumulate nucleins such as uranium, uranium and uranium.

Tokyo Electric originally stored them in ground tanks with a capacity of more than 1.3 million tons. As space depletion and maintenance pressures increased, the Japanese government decided in April 2021 to discharge them into the Pacific Ocean. This choice is based on an advanced liquid treatment system that removes 62 nucleins, and only the remaining uranium is released by dilution.

Compared to the emergency crisis directly leaked at the start of the accident, the plan lasted 30 to 40 years, claiming that the total annual uranium emissions were less than 22 trillion Becquerels, below the operational standard.

But this decision ignored the shared attributes of the oceans.The Pacific is not Japan¡¯s private waters, and pollutants spread with the flow of the black tide, potentially affecting the fishing fields of East Asia.

The Chinese Ministry of Foreign Affairs has repeatedly pointed out that this move violates international obligations and shifts risks to neighboring countries. Before launching the sea discharge on August 24, 2023, the International Atomic Energy Agency assessed that it met safety standards, but China emphasized that the assessment did not cover long-term ecological impacts.

After the start of sea discharge, the chain effect quickly appeared. The first is the economic shock. China, the largest importer of Japanese aquatic products, completely banned the import of Japanese seafood on August 24, 2023. This ban covers all aquatic products and aims to protect public health.

Data shows that Japan's exports to China accounted for 40% of its water industry, and the ban resulted in more than 30% sharp exports in 2023 and a loss of more than $1 billion.

Japan tried to shift to the European and American markets, but the cost of transportation was higher and consumer confidence was insufficient. Compared to the short-lived trade volatility after the 2011 disaster, the ban lasted for two years, forcing the Japanese water industry to transform.

Why does Japan underestimate this economic chain?They may think that technology processing can persuade the international community, but ignore the sensitivity of the public to radiation.The Chinese consumer survey showed that 80% of Japanese seafood are cautious, pushing up domestic fisheries, using drones to monitor water quality, and increasing efficiency three times.

Japan promotes "safe water", but failed to reverse market panic. On the ecological level, pollutants enter the food chain, algae absorb nuclein, floating biodiversity decreases, and fish migration paths change. China's coastal detection station in 2024 that micro-volumes of uranium 90 occurred in samples in the East Sea, although not exceeded, but aroused caution.

International studies have shown that uranium has a half-life of 12 years, and bio-enrichment can increase its concentration thousands of times. Unlike land pollution in Chernobyl, marine fluidity makes it wider and harder to repair.

Japan invests billions of yen in underwater robotic surveillance and artificial fish reefs, but the population recovery rate is only 10 percent.China has strengthened the Yellow Sea patrol, doubling its coverage, andining the stability of local fisheries.

So far, Japan has discharged more than 100,000 tons, and there is no abnormality in the monitoring of the International Atomic Energy Agency. However, the long-term model predicts that the North Pacific circulation may carry traces to the distance. Japan did not foresee this transboundary impact because their ocean current models did not fully consider the accelerated cycle of climate warming at the beginning, resulting in prolonged pollutant retention.

Diplomatic tensions intensified. China summoned the Japanese ambassador to stress responsibility for the transfer of marriage. South Korea and the Pacific island countries protested for violating the United Nations Convention on the Law of the Sea. China is pushing for an east Asian radiation monitoring network that is more mechanized than ever in bilateral dialogue.

In September 2024, China and Japan reached a consensus that Japan would allow Chinese experts to take field samples, which would make progress over initial unilateral monitoring and promote data sharing, but China¡¯s stance was firm and opposition never changed.

In May 2025, the two countries reached a consensus to restore imports, if safety monitoring, will gradually release non-Fukushima seafood.This is due to multiple independent sampling, China's laboratory analyzed sea water and biological samples, not seen uranium and uranium abnormalities.

Compared with history, in 1954, the bikini nuclear test contaminated fish. At that time, there was no international norm, but now the Convention exists, but its implementation is weak. Although Japan's discharge into the sea is divided into multiple rounds, each round is about 7,800 tons, the interruption will expose vulnerabilities such as a power failure in 2024.

Now add backup power supply to improve reliability, but the cumulative effect remains.Global nuclear energy policy is affected, China advances zero-emission technology, emphasizes closed cycle, and focuses on sustainability over the Japanese model.

The underestimated cost of Japan is gradually emerging. Trade barriers stimulate local supply, and Vietnamese and Thai seafood fill the gap. The health impact is gradually emerging, and the abnormal rate of thyroid gland among Fukushima residents is higher than the average. Although there is no direct evidence of Lianpai Sea, the epidemiology is alert.

The international community is divided, and Western media sometimes exaggerates China¡¯s reaction, but the fact is that Japan¡¯s decisions raise widespread doubt.

At present, the discharge into the sea lasts for two years, and China partially lifts the ban, but the monitoring continues. This stems from dialogue and turns to cooperation, but the ecology needs long-term observation.

China is calling for strict emission rules to avoid repetition. Japan regrets signs seen in the media, such as the doubling of economic deficits and environmental crises.