Radioactive Fish Caught Near Fukushima
Bottom-dwelling fish shows record cesium levels
A fish caught near the Fukushima No. 1 nuclear power plant last month now officially holds the dubious honor of being the world's most radioactive marine life ever tested, according to the Tokyo Electric Power Co., which owns the plant and has been testing marine life in the area.
The greenling, a bottom-dwelling fish that the Asahi Shimbun says is a delicacy in Japanese cuisine, had radioactive cesium at 7,400 times the maximum amount considered safe for human consumption by the Japanese government.
Most fish near Fukushima are banned from going to market over fears of radiation contamination since the plant was damaged in the March 11, 2011, earthquake and tsunami and spilled radiation into the surrounding water.
According to RT News, some experts think that radioactive water might still be seeping into the ocean from the nuclear power plant. Another greenling in the vicinity of the plant tested as having a concentration of 510,000 becquerels of radioactive cesium per kilogram, or 5,100 times the legal limit, and a bluefin tuna caught off the coast of California tested positive for radiation in February.
Japan sells first fish caught near Fukushima following nuclear crisis
TOKYO – The first seafood caught off Japan's Fukushima coastline since last year's nuclear disaster went on sale Monday, but the offerings were limited to octopus and marine snails because of persisting fears about radiation.
Octopus and whelk, a kind of marine snail, were chosen for the initial shipments because testing for radioactive cesium consistently measured no detectable amounts, according to the Fukushima Prefectural (state) fishing cooperative. They were caught Friday and boiled so they last longer while being tested for radiation before they could be sold Monday.
Flounder, sea bass and other fish from Fukushima can't be sold yet because of contamination. It was unclear when they will be approved for sale as they measure above the limit in radiation set by the government. The government is testing for radioactive iodine as well, but its half-life is shorter than cesium and thus is less worrisome.
"It was crisp when I bit into it, and it tasted so good," said Yasuhiro Yoshida, who oversees the seafood section at York Benimaru supermarket in Soma, which sold out of about 30 kilograms (65 pounds) of the snails and 40 kilograms (90 pounds) of the octopus that had been shipped to the store.
The March 11 earthquake and tsunami last year left the coastlines of northeastern Japan devastated, and displaced tens of thousands of people. Entire towns were contaminated by the radiation leaking from Fukushima Dai-ichi nuclear plant, where three reactors went into meltdowns.
"I was filled with both uncertainty and hope today, but I was so happy when I found out the local supermarket had sold out by 3 p.m.," said Hirofumi Konno, an official in charge of sales at the fishing cooperative in Soma city in coastal Fukushima.
He said he hoped crabs would be next to go on sale as radiation had not been detected in them, but he acknowledged things will take time, perhaps years, especially for other kinds of fish. Radiation amounts have been decreasing, but cesium lasts years.
The octopus and snail were selling at almost half of what they fetched before the disaster, he said. But he said people were buying Fukushima seafood to show support for local fishermen. The items were available locally but not in the whole prefecture or the Tokyo area.
Nobuyuki Yagi, a University of Tokyo professor studying the fisheries industry after the disaster, said serious concerns remain over whether anyone would buy Fukushima fish, and the key lay in finding the types of fish that don't store radioactive elements.
"Fishing cannot survive unless people buy the fish. That may seem obvious, but Fukushima is facing up to this," he said in a statement earlier this month.
Farmlands have also been contaminated, and every grain of rice will be tested at harvest in some areas before they can be sold. The image of Fukushima produce has been seriously tarnished, and worried consumers, especially those with children, are shunning Fukushima-grown food.
Record radiation found in fish near Fukushima plant
Radioactive cesium measuring 258 times the amount that Japan's government deems safe for consumption has been found in fish near the damaged Fukushima Daiichi nuclear power plant, Japan's Kyodo news agency reported Tuesday.
The Tokyo Electric Power Co. found 25,800 becquerels per kilogram of radioactive cesium in two greenlings in the sea within 20 kilometers of the plant on August 1 - a record for the thousands of Fukushima-area fish caught and tested since the March 2011 earthquake and tsunami that led to a nuclear disaster at the plant, Kyodo reported.
Japan's government considers fish with more than 100 becquerels per kilogram unsafe for consumption. A becquerel is a measurement of radioactive intensity.
TEPCO said it also found limit-exceeding radioactive cesium levels in several other kinds of fish and shellfish during the testing, which happened in the Fukushima area from mid-July to early August, according to Japanese broadcaster NHK.
The finding comes 17 months after the disaster at the plant, which spewed radiation and displaced tens of thousands of residents from the surrounding area. It was the worst nuclear accident since the 1986 Chernobyl disaster in Ukraine.
News of the finding also comes after scientists reported finding mutant butterflies - with abnormalities in their legs, antennae and abdomens, and dents in their eyes - in and around Fukushima prefecture in the months after the nuclear disaster.
The previous post-disaster radiation record in fish - 18,700 becquerels per kilogram, or 187 times the government's limit - was found in landlocked salmon in Iidate village, Fukushima prefecture, on March 18, according to Japan's fisheries agency, which has conducted its own tests in conjunction with local governments.
Japan's government has restricted fishing in the Fukushima area since the disaster. However, fishing for two kinds of octopus and one kind of shellfish has happened on a trial basis more than 50 kilometers outside the plant since June, NHK reported.
The vast majority of the thousands of fish tested since the disaster are within the government's radioactive cesium limit, according to the fisheries agency.
TEPCO plans to do more testing - of rock trout, their prey and mud from the seabed - in August and September, NHK reported.
Fukushima Radiation: Is Wild Alaskan Seafood Safe to Eat?
Ever since the disastrous meltdown of Japan&rsquos Fukushima reactor in 2011, scientists have been trying to assess the effect of radiation on Japan&rsquos environment, where the incident occurred, and also to trace radiation in fish all across the Pacific Ocean. While there is no denying the tsunami and related nuclear meltdown did a large amount of damage in Fukushima, seafood enthusiasts might be wondering if the damage spread to their own backyard, to Alaskan salmon, for instance. Especially, since Japan recently announced that they will start releasing the water used to cool the nuclear reactors at Fukushima back into the ocean in 2 years.
Here&rsquos the Good News
The Alaska Department of Environmental Conservation has proactively monitored for contaminants in Alaska seafood since 2001, and the results of these tests, including the gamma radiation testing, has confirmed the quality and health of Alaska seafood. Since 2017, DEC confirmed that no traces of Fukushima-related radionuclides Iodine-131, Cesium-134 or Cesium-137 have been found in samples of Alaskan salmon including king, chum, sockeye and pink. (1)
&ldquoThe Fukushima leaks were miniscule compared to the vast scale of the Pacific," said Nicholas S. Fisher, an expert on nuclear radiation in marine animals at Stony Brook University in New York, in an article published by Oceana, a non-profit dedicated to protecting and restoring the world&rsquos oceans (2). &ldquoThe disaster added just a fraction of a percent to the radiation that&rsquos already in the ocean, 99 percent of which is naturally occurring. At those levels, you could eat piles of Pacific fish and have nothing to worry about from radiation," Fisher said.
The Testing is Ongoing and Far Reaching
The U.S. Division of Environmental Health tested other species as well to determine the levels of radiation in fish aside from salmon including halibut, pollock, sablefish, and herring, and none of those fish tested positive for Fukushima radiation either. The testing has been going on periodically from 2014-present and no detectable amounts have ever been found in any Alaskan seafood.
&ldquoDEC, in cooperation with its partners, currently deems fish and shellfish from Alaska waters unaffected by the nuclear reactor damage in Japan,&rdquo the department&rsquos statement read. And although no trace of radiation has been found, the statement also read that the &ldquoDEC continues to collaborate with other government agencies and researchers monitoring the marine environment.&rdquo (3) Alaska has worked together with federal and tribal officials to ensure that consumers know that none of their prized seafood poses a threat.
&ldquoNot only has sampling lifted no radioactive materials from Alaska&rsquos fish &ndash predictive ocean modeling has also indicated that Alaska seafood is not at risk for potential Fukushima contaminants, as was found by the state Department of Environmental Conservation. Department officials were able to sample the fish directly thanks to an arrangement with the FDA,&rdquo reports Seafood Source, a leading source of seafood industry news, covering seafood trade, food service and retail, aquaculture, sustainability and more. (3)
New Data Gathering/Research Expansion Plan
Most notably, the Alaska Department of Environmental Conservation has recently announced its plans to even further expand their testing for gamma radiation and potential local environmental contaminants. "To date, we have not detected any radionuclides associated with Fukushima, and going forward we will be expanding radiation testing to further ensure these products are safe," says Dr. Bob Gerlach, the State Veterinarian.
Enjoy The Radioactive Fish: Tests Show Fukushima Fish Are Up To 124X Above Safe Level
Are you purchasing radioactive fish at the grocery store? Are you absolutely certain that you know the answer to that question? You are about to read about a test that discovered that a fish recently caught off the coast of the Fukushima prefecture was found to have 12,400 becquerels per kilogram of radioactive cesium. That is 124 times above the level that is considered to be safe. But it is not just fish caught off the coast of Japan that you need to be concerned about. In this article I will also discuss a report by the National Academy of Sciences which states unequivocally that Pacific Bluefin tuna have “transported Fukushima-derived radionuclides across the entire North Pacific Ocean”. In fact, if you just had a tuna sandwich for lunch you may have ingested radioactive material without even knowing it. Each day, another 300 tons of highly radioactive water is released into the Pacific Ocean at Fukushima, and that means that the total amount of radioactive material that is getting into our food chain is constantly increasing. And since some of these radioactive elements have a half-life of about 30 years, that means that our food chain is going to be contaminated for a very, very long time.
Strangely, the mainstream media in the United States has been extremely quiet about all of this. The following is an article from a Russian news source about this highly radioactive fish that was just caught off the coast of the Fukushima prefecture…
Fish with deadly levels of radioactive cesium have been caught just off the coast of Fukushima prefecture, as scientists continue to assess the damage caused to the marine food chain by the 2011 nuclear disaster.
One of the samples of the 37 black sea bream specimens caught some 37 kilometers south of the crippled power plant tested at 12,400 becquerels per kilogram of radioactive cesium, making it 124 times deadlier than the threshold considered safe for human consumption, Japan’s Fisheries Research Agency announced.
That same article also noted that a fish that was caught last year near Fukushima contained a level of cesium that was actually far greater…
The record cesium reading was recorded last year when a fish caught near the plant carried 740,000 becquerels of cesium per kilogram.
Would you eat such a fish?
The truth is that there might be one in your freezer right now.
According to an absolutely shocking report put out by the National Academy of Sciences, it has been proven that Pacific Bluefin tuna have transported highly radioactive material “across the entire North Pacific Ocean”…
“We report unequivocal evidence that Pacific Bluefin tuna, Thunnus orientalis, transported Fukushima-derived radionuclides across the entire North Pacific Ocean.”
If so, you might want to start asking some questions.
And there is a lot of other evidence that the food chain in the Pacific Ocean is becoming highly contaminated. The following are just a few facts from one of my previous articles entitled Signs The Media Is Lying To You About How Radiation From Fukushima Is Affecting The West Coast“…
–The population of sockeye salmon along the coastlines of Alaska is at a “historic low”.
–Experts have found very high levels of cesium-137 in plankton living in the waters of the Pacific Ocean between Hawaii and the west coast.
–One test in California found that 15 out of 15 Bluefin tuna were contaminated with radiation from Fukushima.
–Back in 2012, the Vancouver Sun reported that cesium-137 was being found in a very high percentage of the fish that Japan was selling to Canada…
• 73 percent of the mackerel
• 91 percent of the halibut
• 92 percent of the sardines
• 93 percent of the tuna and eel
• 94 percent of the cod and anchovies
• 100 percent of the carp, seaweed, shark and monkfish
You can read the rest of that article right here.
So once again, are you absolutely certain that you are not purchasing radioactive fish at the grocery store?
The U.S. government says that the fish are safe.
But the government also promised the sailors on the USS Ronald Reagan that they would be safe when they went over to provide assistance in the aftermath of the Japanese earthquake back in 2011. It turns out that was a lie too…
The roll call of U.S. sailors who say their health was devastated when they were irradiated while delivering humanitarian help near the stricken Fukushima nuke is continuing to soar.
So many have come forward that the progress of their federal class action lawsuit has been delayed.
Bay area lawyer Charles Bonner says a re-filing will wait until early February to accommodate a constant influx of sailors from the aircraft carrier USS Ronald Reagan and other American ships.
More than 70 sailors from that aircraft carrier have reported that they have developed conditions such as testicular cancer, thyroid cancer, Leukemia, “unremitting gynecological bleeding” and brain tumors. Their lives have been ruined, and nobody wants to step forward and take responsibility.
So are you going to just blindly trust that the government is telling you the truth about all of this?
Out in California, one team of researchers from California State University is so concerned that they are going to start monitoring California’s kelp forest for signs of radiation…
Researchers from California State University, Long Beach (CSULB) and the Lawrence Berkeley National Laboratory have launched “Kelp Watch 2014,” a scientific campaign designed to determine the extent of radioactive contamination of the state’s kelp forest from Japan’s damaged Fukushima nuclear power plant following the March 11, 2011, earthquake and tsunami.
Initiated by CSULB Biology Professor Steven L. Manley and the Berkeley Lab’s Head of Applied Nuclear Physics Kai Vetter, the project will rely on samples of Giant Kelp and Bull Kelp from along the California coast.
“The California kelp forest is a highly productive and complex ecosystem and a valuable state resource. It is imperative that we monitor this coastal forest for any radioactive contaminants that will be arriving this year in the ocean currents from Fukushima disaster,” said Manley, an expert in marine algae and kelp.
And as I noted the other day, one independent researcher recently discovered radiation levels near the water at Pacifica State Beach that were up to five times higher than normal background radiation.
The evidence is piling up, and it is becoming clear that the Japanese government and the U.S. government are not telling us the truth. Of course governments all over the world have not been telling us the truth about a lot of things for a very long time. This is a theme that I explored extensively in my new novel. In this day and age, it is imperative that we all learn to break out of “the matrix” and learn to think for ourselves.
Sadly, most Americans choose not to do that. In the video posted below, activist Mark Dice asks average Americans to sign a petition to repeal the 3rd Amendment and allow U.S. soldiers to commandeer anyone’s home and live there for free. As you can see, many of the “sheeple” were quite happy to sign the petition without asking any questions…
Are the fish that you are purchasing at the grocery store safe to eat?
Please feel free to share your thoughts by posting a comment below…
Fishing boats are seen at Ukedo port with a backdrop of Fukushima Daiichi nuclear power plant in Namie town, Fukushima prefecture, Japan, April 13, 2021. (YUSUKE OGATA / KYODO NEWS VIA AP)
The Japanese government banned shipments of black rockfish from Fukushima on Monday, after a radioactive substance was found to be more than five times higher than acceptable levels in the fish caught off the prefecture.
The Fukushima prefectural government said 270 becquerels of radioactive cesium were detected per kilogram of the black rockfish, which is five times more than the limit set by a local fisheries cooperative of 50 becquerels per kg
The Fukushima prefectural government said 270 becquerels of radioactive cesium were detected per kilogram of the black rockfish, which had been caught at a depth of 37 meters near the city of Minamisoma, Fukushima, on April 1.
The amount of radioactive cesium is five times more than the limit set by a local fisheries cooperative of 50 becquerels per kg. It is also sharply higher than Japan's national standard in general foods of 100 becquerels per kg.
In response, Japan's national nuclear emergency response headquarters on Monday ordered a ban on the shipment of the fish caught off the waters of Fukushima.
Early in February, radioactive cesium 10 times above permitted levels in Japan were detected in the same area.
Scientific research showed the amount of cesium in foods and drinks depends upon the emission of radioactive cesium through the nuclear power plant, mainly through accidents. High levels of radioactive cesium in or near one's body can cause nausea, vomiting, diarrhea, bleeding, coma, and even death.
Monday's restrictions came a week after Japan's government decided to release radioactive water from the crippled Fukushima Daiichi nuclear plant into the sea despite fierce opposition from fishing crews at home and concern from the international community.
"The (Japanese) government's decision is outrageous," said Takeshi Komatsu, an oyster farmer in Miyagi prefecture, north of Tokyo. "I feel more helpless than angry when I think that all the efforts I've made to rebuild my life over the past decade have come to nothing."
South Korea strongly criticized the decision to release the contaminated water, with its Foreign Ministry summoning the Japanese ambassador. President Moon Jae-in ordered officials to explore petitioning an international court over the issue.
Fukushima Radiation: Is it Safe to Eat the Fish?
Following Japan’s devastating 2011 earthquake and tsunami, fear spread about risks of leaked radiation from the Fukushima Daiichi nuclear power plant—for the health of those living in or near Fukushima or involved in cleanup efforts, and for the planet and the potential impacts on our complex marine food web.
Shunichi Tanaka, head of Japan’s Nuclear Regulation Authority, told reporters radioactive water has likely been leaking into the Pacific Ocean since the disaster hit. It’s the largest single contribution of radionuclides to the marine environment ever observed, according to one report. With 300 tons of contaminated water pouring into the sea every day, Japan’s government finally acknowledged the urgency of the situation in September.
Social media is now abuzz with people swearing off fish from the Pacific Ocean. Given the lack of information around containment efforts, some may find this reasonable. But preliminary research shows fish caught off Canada’s Pacific Coast are safe to eat.
It will take about three years from the time of the incident for the radiation plume to reach the West Coast, which would be early next year. Recent testing of migratory fish, including tissue samples collected from Pacific bluefin tuna caught off the California coast, assessed radiation levels and potential effects on marine food webs far away from Japan. Trace amounts of radioisotopes from the Fukushima plant were found, although the best available science puts them at levels below those naturally occurring in the environment around us. Natural, or background radiation, is found in many sources, including food items, medical treatments and air travel.
The most comprehensive health assessment, by the World Health Organization (WHO), concludes radioactive particles that make their way to North America’s waters will have a limited effect on human health, with concentrations predicted to be below WHO safety levels.
More reports are in the works. The UN agency charged with assessing global levels and consequences of ionizing radiation will present its findings to the UN General Assembly this month. This is where we may find answers about the amount of radioactive material released, how it was dispersed and any repercussions for the environment and food sources.
The ocean is vast and dynamic with many complexities we don’t fully understand. It appears two currents off Japan’s coast—the Kuroshio Current and Kurushio Extension—diluted radioactive material to below WHO safety levels within the first four months of the disaster. Eddies and giant whirlpools, some tens of kilometers wide, continue the dilution and will direct radioactive particles to coastal areas for at least two decades.
Fish from the water near the crippled plant are not faring so well. High levels of cesium-134, a radioactive isotope that decays rapidly, were found in fish samples there. Radiation levels in the sea around Japan have been holding steady and not falling as expected, further demonstrating that radiation leakage is not under control. At least 42 fish species from the immediate area are considered unsafe for consumption, and fisheries there remain closed.
New concerns continue to arise. While the initial leak contained cesium isotopes, water flowing into the ocean from the plant now appears to be higher in strontium-90, a radioactive substance that is absorbed differently. While cesium tends to go in and out of the body quickly, strontium heads for the bones.
A huge accumulation of radioactive water at the plant must be dealt with immediately. Determining the full effects of years of exposure to lower levels of radioactive contamination leaking into the ocean will take time and require continued monitoring and assessment. While Health Canada monitors radionuclide levels in food sold in Canada, and one of its studies incorporates samples from Vancouver, we need to remain vigilant and demand timely monitoring results.
Any amount of leaked radiation is harmful to the planet and the health of all species, including humans. A major release of radioactivity, such as that from Fukushima, is a huge concern, with unknowns remaining around long-term health risks such as cancers.
That doesn’t mean it’s unsafe to eat all fish caught on the Pacific West Coast. I’m taking a precautionary approach: fish will stay part of my diet, as long as they’re caught locally and sustainably, and will remain so until new research gives me pause to reconsider.
Visit EcoWatch’s NUCLEAR and FOOD pages for more related news on this topic.
A nuclear landscape
Jasanoff visited the TEPCO site in 2018, and her memories are of a landscape that still clearly showed the nuclear accident’s effects. “What one sees is complete devastation, with huge numbers of blue tanks of cooling water proliferating around the site,” she says.
Elsewhere in the prefecture, radioactive soil has been scraped up and left in tens of thousands of plastic bags of soil, buried in people’s yards or heaped on top of each other as temporary storage. “On a particularly drizzly day, the [bags] were sitting in fields with ponds of still water around them,” Jasanoff recalls with horror.
The government has proposed using soil with lower radiation levels as the foundation for roads and other infrastructure, an idea that has met with opposition.
When the landscape itself is dotted with warning signs, Jasanoff isn’t surprised that those who have been displaced don’t trust the government’s claims of safety. “There’s a contradiction between the experiential knowledge of people, and the gaps they see in the care taken by the government,” she says.
Japanese Angler Catches Giant Wolffish near Fukushima
Hirasaka Hiroshio has a job that most anglers would envy. The Japanese fisherman has spent the past several years traveling, fishing, and eating strange or rarely-seen fish. Hirasaka is in the news for recently landing a massive wolffish off the coast of Hokkaido, but the fish’s size is only part of the reason why the catch has caused a stir. The other reason is that the wolffish was caught only a few hundred miles from Fukushima, the site of the 2011 nuclear power plant disaster.
Wolffish generally grow to only about three feet and about 30 pounds in weight. The wolffish caught by Hirasaka is significantly larger, which led to speculation that the critter may have been affected by radioactive runoff from the Fukushima disaster zone.
Fishing in the region was banned as recently as 2013 after scientists found fish that measured several thousand times over the acceptable radiation limit for human consumption. Although fishing and the sale of fish harvested from the region have resumed, many are still wary of lingering aftereffects, especially after it was discovered that 300 tons of contaminated water had been leaking from one of the plant’s holding tanks.
Radioactive contamination has been suspected to led to deformities such as gigantism. Visitors to Chernboyl have reported sightings of massive wels catfish. However, wels catfish naturally grow to large sizes. Scientists say that despite elevated levels of radioactive isotopes near Fukushima, there should be no significant harm to the local marine life.
What explains this massive wolffish? Like any other large fish, perhaps it is just a case of good genes, plenty of food, and time to grow. Hirasaka himself wrote online that he has seen wolffish of the same size before and did not think this particular one was special. However, the angler did seem to be quite taken with the fish—not that it means the critter will escape the dinner table.
“It was worth flying to Shiretoko [Hokkaido] twice within three months,” the angler wrote on Twitter. “This guy is super cool!”
Hirasaka did not say whether he released the fish or ended up cooking it.
Radiation still high in fish near Fukushima
Three weeks after the March 11, 2001, earthquake and tsunami crippled the Fukushima Dai-ichi nuclear power plant, Japanese fishermen unloaded their catch at the nearby Hirakata fish market in Kitaibaraki, Ibaraki prefecture. Today, fish and seafood caught off the coast of the plant show radioactive cesium continues from either reactor leaks or seabed sediment. (Photo: Toru Yamanaka, AFP/Getty Images)
- U.S. researcher finds elevated cesium levels, especially in bottom-feeding species
- "Vast majority" of seafood caught off northeast Japan shows levels below world safety standards
- Radiation coming from reactor leaks or concentrated contamination on the seafloor
Most fish and seafood caught near Japan's damaged Fukushima nuclear plant still have elevated levels of radioactive cesium more than 18 months after the March 2011 earthquake and tsunami, indicating continued contamination from either reactor leaks or seabed sediment, a U.S. researcher reports.
Nonetheless, the "vast majority" of fish caught off the northeast coast show radiation levels below tightened Japanese and international limits for seafood consumption, concludes marine chemist Ken Buesseler, of the Woods Hole Oceanographic Institution.
His analysis of data from the Japanese Ministry of Agriculture, Forestry and Fisheries was published Friday in the journal Science. He led an international team last year that studied the spread of radioactive elements from the Fukushima Dai-ichi plant.
"Although offshore waters are safe with respect to international standards for radionuclides in the ocean, the nuclear power plants continue to leak radioactive contaminants into the ocean," Buesseler says.
Buesseler found that 40% of bottom fish — cod, flounder, halibut, pollock, sole, greenlings and others — remain above the limit. Two greenlings caught in August contained cesium levels that were 250 times the level the government considers safe, the Associated Press notes.
Except for octopus and sea snails, the Japanese government has banned fish, other seafood and seaweed harvested near Fukushima from domestic markets or being exported.
Tokyo Electric Power Co. (TEPCO) has acknowledged that radioactive water used to cool the plant's damaged reactors leaked into the Pacific several times, most recently in April.
"Given the 30-year half-life of cesium-137, this means that even if these sources (of contamination) were to be shut off completely, the sediments would remain contaminated for decades to come," Buesseler wrote.
The study came as TEPCO said in its daily report that it had begun pumping contaminated water from the turbine room basement of Unit 3 to a radioactive-waste-treatment facility.
Japan's Nuclear Regulation Authority is monitoring radioactivity concentrations in seawater near the plant, plus mapping the distribution of the radiation.
The latest research on how the disaster has affected the ocean and marine life will be presented next month at a symposium in Tokyo.