|Our R&D in safety covers a wide range of topics. We conduct research on human factors to accurately identify and analyze the major causes of accidents and potential accidents. Another area of research is on rolling stock safety such as prevention of the wheel-climb derailment in low speed ranges. System development is conducted for safety in maintenance work. Research is conducted to evaluate safety against natural disasters such as for wind gusts, earthquakes, torrential rain, and snow. We also conduct research to secure safety of passengers at stations.