Monday, April 22, 2013

日本の汚染食品傾向と放射性物質を落とす下準備   Current information on contaminated food in Japan and Ways to reduce the radioactive elements in food

2 years later since the accident....

Tendency of Cs contamination in Fukushima as of April 2013, summarized by Prof. Kunihiko Takeda



[Extremely dangerous]Wild Mushroom, Raw wood grown Shiitake, Wild Boar meat, Wild Bear meat, Bottom water fish (e.g. F...lounder), Inland water fish (e.g. Sweetfish-ayu), Chestnuts, Yuzu citron, Ostrich fern, Bamboo, Dried persimmon, Dried daikon)

[Dangerous]Kiwi fruits, Blueberry, Persimmon, Plum, Edible wild plants ( Fuki –Petasites japonicus, Eleutherococcus sciadophylloides, Japanese angelica), Herb (Sage, Bay leaf, Thym, Mint), Soy bean, Red bean, Malabar spinach, Spinach, Japanese mustard spinach, Tenderstem broccoli, Lotus root

** We have to watch Soy bean produced in Japan . 90 bq/kg was found in a sample from Miyagi prefecture, and more from other prefectures.

[Beware]Cherry, Peach, Apple, Bracken, Perillas, Brown rice, Bok Choy, Potato, Yacon, Pumpkin

[Level decreasing]Apple, Pear, Perillas, Brown rice, Bok Choy, Potato, Yacon, Daikon, Carrot, Onion, Egg plant, Tomato, Cucumber, Strawberry, Pork, Chicken

**The detection level of almost all beef tested is 25 bq/kg. This is a high detection level. For example, if beef were 20 bq/kg, it would be too high but it would not show up on the test results because it would be below the detectible level. So it's hard for us to understand the real level of contamination.

Very sadly...We cannot recommend daily products, imported food from Japan and Pacific seafood. But for those who choose to have them, here is some information on how you can effectively wash out cesium from your foods.



High concentrations of radiocesium (134Cs, 136Cs, and 137Cs combined) were detected in several fish species such as nibe croaker, Pacific cod, and brown hakeling, which were collected from the Pacific Ocean off the coast of the Fukushima and Ibaraki Prefectures. High levels of radiocesium accumulated in fish muscle, but the radioactivity levels of naturally occurring radioactive K in some contaminated fish exceeded the levels of 134Cs and 137Cs. Three washes with 0.1% NaCl solution effectively removed the radiocesium from contaminated fish meat. This can be applied in the production of surimi-based products and other processed seafood such as boiled, dried, or seasoned products.


福島、茨城沖の腹赤、タラ、エゾイソアイナメ のような種類の魚のいくつかから、非常に高い値の放射性セシウム134、136、137が検出されました。高レベルの放射性セシウムは魚の筋肉に蓄積します。しかし、それらの魚に含まれる自然に発生する放射性カリウムは、セシウム134や137のレベルを超えるものでした。0.1%の塩化ナトリウム(食卓塩)水で3回洗うと、汚染された魚の肉から放射性セシウムを効果的に取り除くことができました。これは、すり身や他のゆでたり、乾燥させたり、味付けのされている加工海産物についても適応できます。

「福島原発事故の農業との密接な関係」全編はこちらFrom Agricultural Implications of the Fukushima Nuclear Acciden

This is an article from Japan Times. Please keep in your mind that this was posted on September 20, 2011.


Vegetables 野菜

The good news is, cesium can be easily dissolved in water. So the best way to prepare vegetables and fruits is to rinse them well before cooking. If possible, cut vegetables into small pieces and soak them in water for a while.
More radiation in spinach and other leafy vegetables can be removed if they are boiled. As for lettuces, throw away the outer leaf and rinse the rest well. Data from Chernobyl shows that rinsing lettuce can remove up to half of the cesium-134 and two thirds of the cesium-137. Cucumbers can be pickled with vinegar, which cuts radiation by up to 94 percent. Peeling carrots and boiling them with salted hot water would also help reduce cesium levels. 

Meat and fish 肉・魚 

Livestock can be tainted through the grass and water they consume. Well-grilled, salt-sprinkled beef poses less risk than anything cooked to a medium-rare or medium state, by cutting 28 percent of cesium, according to a Chernobyl-tied study. Boiling leg meat has been proved to reduce cesium by about 50 percent. Make sure to drain off the hot water. Don’t worry about the pork bone broth; cesium accumulates mostly in meat, not bones, and *the levels of strontium-90, which does accumulate in bones, are negligible. 

*Please note, we have NOT seen any test result for bones. This might be wrong. 

For fish and other seafood, however, watch out for strontium-90, which has a half-life of 29 years. According to Noguchi, far greater quantities of strontium-90 were released into the ocean than into the air and ground. Contrary to popular thinking, large fish are not necessarily riskier to consume. Though large fish do eat smaller fish, which leads some to believe they accumulate more radioactive materials, Noguchi says it is the small fish and flat fish that have stayed close to the Fukushima plant that pose more risk. Unlike large fish that swim longer distances, small fish cannot move far from contaminated areas.

With tuna fish, rinse with water before eating or cooking. Boiling or marinating salmon helps remove cesium-137, and avoid eating fish bones, as they could contain strontium-90. 

Rice and wheat 米・麦 

Much has been said about the nutritiousness of brown rice, but when it comes to radiation, it is the bran layer beneath the husk that absorbs and accumulates cesium from soil. That means white, polished rice, which has no bran layer, is a safer option — though it does contain fewer vitamins, minerals and fiber than brown rice. If you rinse white rice well before cooking, you can also remove radiation-emitting residue on the grain.

Wheat products such as bread, spaghetti and noodles pose very little risk, since 90 percent of wheat in Japan has been imported from overseas. For those concerned with radiation in pasta or noodles made from wheat in Japan, the thinner the noodle, the more cesium released when cooked.

Dairy products 乳製品

Cheese and butter are fine, too, because, during their production, the milk whey — the liquid that gets separated from curd — is removed. While rich in nutrition, cesium and strontium tend to remain in whey. Yogurt, which usually has whey floating on top, also undergoes radiation checks before going on the market, but if you are still worried, pour off the whey before you eat the yogurt.

Seaweed 海藻 

Wakame (soft seaweed) and kombu (kelp) are integral parts of the Japanese diet. They flew off store shelves in the wake of the nuclear disaster, when consumers heard that the natural iodine in them might help them fight radiation contamination.

Seaweed from the sea close to the nuclear plant, however, will likely absorb high levels of radiation in the coming years. You can rinse it before cooking, or choose seaweed harvested elsewhere.

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