The 2011 off the Pacific coast of Tohoku Earthquake on March 11 was a record great natural disaster. To protect us from earthquakes, seismological researchers have been forecasting or predicting earthquakes mainly in the particular areas where earthquake will bring great damages. Some researches point out about the co-occurrence of earthquakes among several areas, however, we have little knowledge about it. In this research, we extract earthquake outbreak patterns of the 2011 Tohoku Earthquake by the proposed method "Co-occurring Cluster Mining", and investigate mechanical correlations among several areas. We acquired novel knowledge about the co-occurrence of earthquake outbreaks.