Yes and this contamination will stretch further and further out. Just think of the food that is grown in areas where fall out is, the fish that are caught, the shores where the water will wash up onto and what will absorb this. Where the contaminated water goes it evaporates and rains down contaminates inland. It keeps reaching further and further out and humanity suffers dire consequences.
Cancer and other disease that will be increased due to this worldwide contamination, most especially near and around Japan, will more than likely not be attributed to the cause as it will not be a direct cause, as most see it. The media and corporations that would otherwise suffer profit losses will cover up any negative data thereby putting humanity at risk.