千葉県Chiba Prefectural Government

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Foreign Languages > Chiba International Information Square > Great East Japan Earthquake Information

Update:September 10, 2018

Great East Japan Earthquake Information

Results of Radiation Measurements of Air, Tap Water, Atmospheric Dust and Rain

Radiation measurements of air, tap water, atmospheric dust and rain taken at Chiba Prefecture Environmental Research Center in Ichihara City

・Air radiation levels as of August 24th, 2018.

  • 7m above ground: 0.26 μsv/h
  • 1m above ground: 0.064 μsv/h  

Air radiation measurements taken from monitoring posts in Ichihara City and Asahi City( Japanese )( External link ) 

Radiation measurements of Tap Water, Atmospheric Dust and Rain (Japanese)

Results of Chiba Agricultural Products Radiation Survey

The amount of radiation in agricultural products in Chiba Prefecture is being measured to assure safety.

Present tests show that the levels of radioactive Cesium are below the Standards(*) as of August 23th, 2018.

Standards for vegetables

      *  Radioactive Cesium: 100 Bq/kg

For details please see the link below.

Chiba Prefecture Agriculture, Forestry, and Fisheries Department Safe and Sustainable Agriculture Promotion Division Website(Japanese)

Marine Products Monitoring Results

 Marine products are being monitored in Chiba Prefecture.

 The shipping restrictions and regulations pertaining to seafood products from Chiba Prefecture do not currently apply to marine fish.

Regarding freshwater fish, carp, crucian carp and stone moroko from Lake Teganuma and eel from the Tonegawa River have exceeded the radiation standards; however, a voluntary stop on the shipment of fish is already being conducted.

Chiba Prefecture will continue to monitor the radiation levels in marine products and promptly publish these results in order to ensure the safety of marine products from Chiba Prefecture. We ask that consumers and retailers continue purchasing and business as usual.

Update:August 23, 2018

*For details please see the link below.

Chiba Prefecture Agriculture, Forestry, and Fisheries Department Fishery Resources Division Website (Japanese)

Results of Radiation measurements for seawater at Chiba port

*Please see the link below

Chiba Prefecture Land Development Department Port and Harbor Division Website( Japanese )