890 houses were damaged in Ibaraki and Tochigi Prefectures.
52 people injured, one died (14-year-old boy).
9 kilometer long path in northern Tsukuba City
F3 on Fujita scale.
Japan Meteorological Agency issued warning 10 minutes before the tornado hit, but Tsukuba City didn't have the public warning system. The city in Tochigi hit by the tornado did have the public warning system, but didn't bother to use it because "warnings happen all the time".
Nothing seems to go right for Japan since March 11, 2011...
From Yomiuri Shinbun (5/6/2012):
Northern part of Tsukuba City in Ibaraki Prefecture was hit by tornado at about 45 minutes past noon on May 6, 2012.
As of 2:40PM, at least 30 houses were destroyed, 30 people injured, including heavily injured.
About 17,000 households are without electricity.
Hails as big as 3 centimeters in diameters fell in Mito City.
ANN video. OMG.