The effects of radioactive materials discharged by the Fukushima No. 1 nuclear plant have spread to marine products. The following are questions and answers regarding contaminated fish:
Why were radioactive materials detected in fish caught off Ibaraki Prefecture?
Marine life can roam, and then there's tides and currents. The sub-Arctic Oyashio current, which flows southward along the Pacific coasts of Hokkaido and the Tohoku region, and the Black current, which flows northward from Kyushu and Shikoku, collide off Choshi, Chiba Prefecture, during this time of the year.