Well, not all foreigners are fleeing Tokyo or Japan. Here is one report by Alex Bieber who is not afraid to stay and who is rather ashamed of people who have left. (If you have a Facebook account, you can read the Japanese version here. If you do not have a Facebook account, you can download the PDF here.)
Another foreigner, an American, who lives in Tokyo and who is not leaving is Mike Rogers. He is also angry at many non-Japanese who have left Tokyo or Japan. He has written many blog posts on this subject, but here is one example. He has also provided lots of facts and links to such useful sources of information as Radiation levels in Shinjuku, radiation levels in Tsukuba, comments by phone from the UK’s Chief Scientific Advisor, Sir John Beddington.
Here is a very interesting chart which shows how much radiation you get from different activities, starting with the very lowest dose – sleeping next to someone!
The situation at Fukushima remains critical, but it looks as if it is stabilizing. And as Sir John Beddington said,
this is very problematic for the area and the immediate vicinity and one has to have concerns for the people working there. Beyond that 20-30km, it’s really not an issue for health.