Ha, no, they're as small-scale as it gets. My wife's aunt and uncle (both in their eighties) run the place, and make enough rice to feed about twenty people a year. Most of it goes to family members. It's a very common in Tohoku, where almost everyone seems to get their rice from family fields. That's why people are so worried. If they bought rice from a supermarket, they'd expect it to have been tested, but they have no idea how to go about testing the home-grown stuff themselves.
But as you say, it's not like the government standards themselves are based on any solid research or anything, so we're damned either way. At this point, if the radiation in food and water is high enough to cause health problems, there's nothing much we can do about it, besides banning the stuff that's obviously too radioactive. We just have to hope that most levels turn out to be harmless.