On the evening of December 11, 1990, a tornado hit the Mobara City in the central part of the Boso Peninsula, about 55km southeast of Tokyo . The tornado produced one of the severest damages in the Japanese record. One person died, 73 persons were injured, 82 houses completely destroyed, 161 houses severely damaged and 1504 houses partly damaged . The characteristics of the tornado as revealed from damage survey are reported.
