More about Tokyo here:
– Kids At Risk: Extremely High Soil Radiation Detected In Tokyo Playground
See also:
– Cs-134/137 detected from 9 of 9 pond smelt samples in Gunma (Fukushima Diary, Aug 25, 2015):
Related to this article.. Triathlon to be held in Haruna lake in Gunma, “80 million pond smelt eggs extinct, 340 Bq/Kg from surviving fish” [URL]
From the report of Ministry of Health, Labour and Welfare published on 8/24/2015, significant density of Cs-134/137 was detected from all of 9 pond smelt samples.
The sampling locations were Gunma prefecture. The samples were collected this August.
Because Cs-134 was detected from 8 of these 9 samples, it is clearly from Fukushima accident.
The highest reading was 62 Bq/Kg.
The report reads these samples were not for sale however it shows radioactive material from Fukushima plant is still accumulated in local aquatic products.
http://www.mhlw.go.jp/file/04-Houdouhappyou-11135000-Shokuhinanzenbu-Kanshianzenka/0000091482_10.pdf