2012 Jan 2nd, South Korea, Seaweed radioactivity test (part 1) from joytek on Vimeo.
On 1/2/2012, they measured 0.76 microSv/h from seaweed, which is from the east coast of Korea.(Unopened)
The background was 0.227 microSv/h. It picked up around by 0.53 microSv/h immediate on the package.
This suggests the sea contamination has spread to not only Pacific ocean but also the Korean / Japanese sea.
Related article http://fukushima-diary.com/2011/12/tsunami-boat-found-in-korean-japanese-sea/
Iori Mochizuki