 Professor Katsuhiko Ishibashi, one of the seismologists who have taken an active interest in the topic, coined the term "genpatsu-shinsai" (原発震災), from the Japanese words for "nuclear power" and "quake disaster" to express the potential worst-case catastrophe that could ensue.Dr Kiyoo Mogi, former chair of the Japanese Coordinating Committee for Earthquake Prediction, has expressed similar concerns, stating in 2004 that the issue 'is a critical problem which can bring a catastrophe to Japan through a man-made disaster'.Warnings from Kunihiko Shimazaki, a professor of seismology at the University of Tokyo, were also ignored.