The japanese government has passed a law to prevent the release of unauthorized information, especially if that information is suitable to undermine public morale. That is particularly information about radiation. This means, the government can effectively prevent panic about the meltdown from breaking out.
Tepco is the only one who is authorized to perform measurements of radiation. And they try to avoid measuring it as much as they can. They do not measure the release of radiactive isotopes that are released into the food chain. They just measure gamma radition, three feet above ground. They do not measure the amount of plutonium that has been released into the ground water.
Instead, they apparently try to contaminate the rest of the world as much as they can. Like spilling the radioactive waste into the Pacific. That enough plutonium and caesium gets into the eating fish. So that it becomes hard to prove statistically that cancer rates are higher in the vicinity of the reactor. Compared to, say, the U.S. west coast. bon appétit
If computers take over (which seems to be their natural tendency), it will serve us right. -- Alistair Cooke