This NHK video below has no sound but does include onscreen captions in English.
Though not labeled in English in the video, it appears the river to the south is the Naka and north is the Kuji.
The hotspot appears nearby Fukushima Daiichi in NHK’s map, however it’s actually over 100km south. In reality, the hotspot is almost directly in front of Tokai nuclear power plant:
Tests done in the area in October 2011:
- Ag-110m @ 416 becquerels per kilogram (Bq/kg) in dried abalone
- Ag-110m @ 1,850 Bq/kg in dried abalone liver
Published: July 22nd, 2012 at 11:50 am ET
- NHK finds radioactive silver in abalone liver at 1,800 Bq/kg over 10 km offshore — 1.74 microsieverts/hr on seafloor — Radiation unexpectedly transported south toward Tokyo November 28, 2011
- CNN: Scientists surprised by high levels of radioactive silver in fish off Japan coast February 22, 2012
- ZDF Bureau Chief: Very high radioactive dose of 65 microsieverts per hour in Fukushima City — “Informed officials 3 month ago, nothing happened until today!” — Many children pass by everyday (PHOTO) May 17, 2013
- Tokyo Professor: Spiders bio-concentrated radioactive silver at 1,000 times level in soil November 8, 2011
- Scientists: First time radioactive silver detected in ocean — Radioactivity levels in seawater are not diminishing as hoped — “Reactor site still seems to be leaking; it hasn’t shut off” February 23, 2012