Reports Yomiuri Shinbun, but it had to hide it under its Health and Medical News section, and never on the front page of the website. Unless you happen on the page from other links (like I did), you would never know that such an article is buried there.
Under the guidance from the government, Yomiuri editors do not want to alarm people, do they?
From Yomiuri Shinbun Health and Medical News section (4/7/2011):
The cumulative radiation level data being compiled by the Ministry of Education and Science in the 20 to 60-kilometer radius from TEPCO's Fukushima I Nuclear Power plant shows that the cumulative radiation for 13 days ending on April 5 exceeded 5,000 micro-sievert [or 5 milli-sievert] in 3 locations OUTSIDE the "stay indoors" zone [of between 20 and 30-kilometer radius].
If you stand outdoors for 13 days at these locations, you would receive 5 times the maximum allowed amount of 1,000 micro-sievert [or 1 milli-sievert] other than the natural radiation and the medical treatment. The largest cumulative radiation was recorded in Akogi in Namie-machi (town), which is located about 30 kilometers northwest of the nuclear plant, at 11,630 micro-sievert [or 11.63 milli-sievert].
According to the map accompanying the article, other locations with high cumulative radiation are:
Tsushima in Namie-machi: 5,257 micro-sievert (or 5.257 milli-sievert)
Nagadoro in Iitate-mura: 6,839 micro-sievert (or 6.839 milli-sievert)
Shimotsushima, Namie-machi: 5,440 micro-sievert (or 5.44 milli-sievert)
That's only for 13 days, from March 24 to April 5.
Fukushima I Nuke Plant's Reactor 1 building blew up on March 11, the Reactor 3 building on March 14, the Reactor 4 building on March 15 (though they called it a "fire" with an explosive noise), and Reactor 2's Suppression Pool on March 15.
But alas, the SPEEDI system of the Ministry of Education and Science didn't work for the crucial 1st week of the accident, because their monitoring stations didn't work.